build: support non-x86 EFI builds

Move the no-mmx/no-sse CFLAGS to X86-64 and IA32 defines in preparation
for ARM32 and Aarch64 support.

Makefile.am

@@ -2564,17 +2564,23 @@ efi_cflags = \
 	-fno-strict-aliasing \
 	-fno-stack-protector \
 	-Wsign-compare \
-	-Wno-missing-field-initializers \
-	-mno-sse \
-	-mno-mmx
+	-Wno-missing-field-initializers
 
 if ARCH_X86_64
 efi_cflags += \
 	-mno-red-zone \
+	-mno-sse \
+	-mno-mmx \
 	-DEFI_FUNCTION_WRAPPER \
 	-DGNU_EFI_USE_MS_ABI
 endif
 
+if ARCH_IA32
+efi_cflags += \
+	-mno-sse \
+	-mno-mmx
+endif
+
 efi_ldflags = \
 	$(EFI_LDFLAGS) \
 	-T $(EFI_LDS_DIR)/elf_$(EFI_ARCH)_efi.lds \