ARCv3: Change address of MULTIPLY_BUILD from 0xC8 to 0x7B

MULTIPLY_BUILD AUX register resides in 0x7B for both ARCv2 and
ARCv3. In turn, 0xC8 is occupied by FPU_BUILD and it's used
correctly by the kernel.

Signed-off-by: Yuriy Kolerov <ykolerov@synopsys.com>

Author: kolerov

arch/arc/include/asm/arcregs.h

@@ -24,7 +24,6 @@
 #define ARC_REG_XY_MEM_BCR	0x79
 #define ARC_REG_MAC_BCR		0x7a
 #define ARC_REG_MPY_BCR		0x7b
-#define ARC_REG_MPY_ARC64_BCR	0xc8
 #define ARC_REG_SWAP_BCR	0x7c
 #define ARC_REG_NORM_BCR	0x7d
 #define ARC_REG_MIXMAX_BCR	0x7e

arch/arc/kernel/setup.c

@@ -320,7 +320,7 @@ static int arcv3_mumbojumbo(int c, struct cpuinfo_arc *info, char *buf, int len)
 	if (arc64) {
 		struct bcr_mpy_arc64 mpy;
 
-		READ_BCR(ARC_REG_MPY_ARC64_BCR, mpy);
+		READ_BCR(ARC_REG_MPY_BCR, mpy);
 		if (mpy.ver)
 			scnprintf(mpy_nm, 32, "mpy%s ", mpy.is64x64 ? " [64x64]" : "");