x86, microcode, amd: Fix warnings and errors on with CONFIG_MICROCODE=m

Fix section mismatch warnings on microcode_amd_early.
Compile error occurs when CONFIG_MICROCODE=m, change so that early
loading depends on microcode_core.

Reported-by: Yinghai Lu <yinghai@kernel.org>
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Link: http://lkml.kernel.org/r/20130531150241.GA12006@jshin-Toonie
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 28dba52..2705532 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1065,7 +1065,7 @@
 
 config MICROCODE_EARLY
 	bool "Early load microcode"
-	depends on (MICROCODE_INTEL || MICROCODE_AMD) && BLK_DEV_INITRD
+	depends on MICROCODE=y && BLK_DEV_INITRD
 	select MICROCODE_INTEL_EARLY if MICROCODE_INTEL
 	select MICROCODE_AMD_EARLY if MICROCODE_AMD
 	default y