x86: discover_ebda section mismatch

Fix section mismatches.  discover_ebda() can be __init.

WARNING: vmlinux.o(.text+0x738a): Section mismatch: reference to .init.data:ebda_addr (between 'discover_ebda' and 'get_model_name')
WARNING: vmlinux.o(.text+0x73c4): Section mismatch: reference to .init.data:ebda_size (between 'discover_ebda' and 'get_model_name')
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/setup_64.c

@@ -248,7 +248,7 @@ static inline void __init reserve_crashkernel(void)
 unsigned __initdata ebda_addr;
 unsigned __initdata ebda_size;
 
-static void discover_ebda(void)
+static void __init discover_ebda(void)
 {
 	/*
 	 * there is a real-mode segmented pointer pointing to the