LoongArch: Disable FIX_EARLYCON_MEM when ARCH_IOREMAP is enabled

When ARCH_IOREMAP is enabled, we are using always accessible DMW for
ioremap(). It makes no sense to create a dedicated mapping for earlycon
given that we can access the region via DMW.

Disable FIX_EARLYCON_MEM when ARCH_IOREMAP is selected. This can ease
debugging for early mapping issues.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Author: FlyGoat

arch/loongarch/Kconfig

@@ -245,7 +245,7 @@ config MACH_LOONGSON64
 	def_bool 64BIT
 
 config FIX_EARLYCON_MEM
-	def_bool y
+	def_bool !ARCH_IOREMAP
 
 config PGTABLE_2LEVEL
 	bool