x86_64: fix section mismatch warnings in tce

Fix the following two section mismatch warnings:

WARNING: vmlinux.o(.text+0x1ce84): Section mismatch: reference to .init.text:free_bootmem (between 'free_tce_table' and 'build_tce_table')
WARNING: vmlinux.o(.text+0x1d04d): Section mismatch: reference to .init.text:__alloc_bootmem_low (between 'alloc_tce_table' and 'kretprobe_trampoline_holder')

In both cases the functions was used only from __init
context so mark them __init.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/x86_64/kernel/tce.c

@@ -165,7 +165,7 @@ int build_tce_table(struct pci_dev *dev, void __iomem *bbar)
 	return ret;
 }
 
-void* alloc_tce_table(void)
+void * __init alloc_tce_table(void)
 {
 	unsigned int size;
 
@@ -175,7 +175,7 @@ void* alloc_tce_table(void)
 	return __alloc_bootmem_low(size, size, 0);
 }
 
-void free_tce_table(void *tbl)
+void __init free_tce_table(void *tbl)
 {
 	unsigned int size;