treewide: unify the linker symbol reference format

Now all linker symbols are declared as type char[]. Though we can
reference the address via both the array name 'var' and its address
'&var'. It's better to unify them to avoid confusing developers.
This patch converts all '&var' linker symbol refrences to the most
commonly used format 'var'.

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/mips/mach-mtmips/mt7621/spl/spl.c b/arch/mips/mach-mtmips/mt7621/spl/spl.c
index aa5b267..25b409e 100644
--- a/arch/mips/mach-mtmips/mt7621/spl/spl.c
+++ b/arch/mips/mach-mtmips/mt7621/spl/spl.c
@@ -86,7 +86,7 @@
 
 uint32_t spl_nand_get_uboot_raw_page(void)
 {
-	const struct stage_header *sh = (const struct stage_header *)&_start;
+	const struct stage_header *sh = (const struct stage_header *)_start;
 	u32 addr;
 
 	addr = image_get_header_size() + be32_to_cpu(sh->stage_size);