x86: Add Kconfig options to be used by arch/x86/cpu/config.mk

Add RESET_SEG_START, RESET_SEG_SIZE and RESET_VEC_LOC Kconfig options
and make arch/x86/cpu/config.mk use these options.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Andrew Bradford <andrew.bradford@kodakalaris.com>
Tested-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 20083e6..e35ae1d 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -69,6 +69,21 @@
 	bool
 	default n
 
+config RESET_SEG_START
+	hex
+	depends on X86_RESET_VECTOR
+	default 0xffff0000
+
+config RESET_SEG_SIZE
+	hex
+	depends on X86_RESET_VECTOR
+	default 0x10000
+
+config RESET_VEC_LOC
+	hex
+	depends on X86_RESET_VECTOR
+	default 0xfffffff0
+
 config SYS_X86_START16
 	hex
 	depends on X86_RESET_VECTOR