options: allow to use .lcf file as customized linker script template

previously LINKER_SCRIPT_FILE only allow .ld file, this commit allow
user to use .lcf file as well.

Signed-off-by: Yuguo Zou <yuguo.zou@synopsys.com>

Author: YuguoWH

doc/documents/getting_started/makefile_manual.rst

@@ -78,7 +78,7 @@ In the following part of this manual, we will only use ``make`` in example, you
 	"  DIG_NAME=xxx                                - Specify Digilent JTAG which to be used, most useful when more than one Digilent USB-JTAG plugged in"
 	"  HEAPSZ=xxx                                  - Specify heap size for program, xxx stands for size in bytes"
 	"  STACKSZ=xxx                                 - Specify stack size for program, xxx stands for size in bytes"
-	"  LINKER_SCRIPT_FILE=xxx                      - Specify customized linker script, xxx stands for the relative path of linker script file to current directory"
+	"  LINKER_SCRIPT_FILE=xxx                      - Specify customized linker script (.ld .lcf), xxx stands for the relative path of linker script file to current directory"
 	"Example Usage:"
 	"  make all                                                                - build example in current directory using default configuration"
 	"  make BOARD=emsk BD_VER=22 CUR_CORE=arcem7d OLEVEL=O2 TOOLCHAIN=gnu all  - build example using configuration (emsk, 22, arcem7d, O2, gnu)"

options/rules.mk

@@ -135,7 +135,7 @@ help :
 	@$(ECHO) '  DIG_NUM=xxx                                 - Specify device serial number which to be used for OpenOCD, most useful when more than one device plugged in'
 	@$(ECHO) '  HEAPSZ=xxx                                  - Specify heap size for program, xxx stands for size in bytes'
 	@$(ECHO) '  STACKSZ=xxx                                 - Specify stack size for program, xxx stands for size in bytes'
-	@$(ECHO) '  LINKER_SCRIPT_FILE=xxx                      - Specify customized linker script, xxx stands for the relative path of linker script file to current directory'
+	@$(ECHO) '  LINKER_SCRIPT_FILE=xxx                      - Specify customized linker script (.ld .lcf), xxx stands for the relative path of linker script file to current directory'
 	@$(ECHO) 'Example Usage:'
 	@$(ECHO) '  make all                                                                - build example in current directory using default configuration'
 	@$(ECHO) '  make BOARD=emsk BD_VER=22 CUR_CORE=arcem7d OLEVEL=O2 TOOLCHAIN=gnu all  - build example using configuration (emsk, 22, arcem7d, O2, gnu)'

options/toolchain/toolchain_mw.mk

@@ -155,7 +155,7 @@ endif
 				-Hnocopyr -Hnosdata -Hnocrt $(LMAP_OPTION) $(APPL_LINK_FILE)
 
 	## Link File Generation Options
-	LINK_FILE_OPT	+= -Hnocopyr -Hasmcpp -Hasext=ld,met -Hnoarcexlib -Hnoarcsimd -E -nostdsysteminc -undef -D__MW__ $(ALL_INCLUDES)
+	LINK_FILE_OPT	+= -Hnocopyr -Hasmcpp -Hasext=ld,lcf,met -Hnoarcexlib -Hnoarcsimd -E -nostdsysteminc -undef -D__MW__ $(ALL_INCLUDES)
 	LINK_FILE_DEPOPT = $(LINK_FILE_OPT) -DENABLE_GENERATE_DEPENDCY_FILE $(MKDEP_OPT)
 
 	## Other Options