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/launch.c b/arch/mips/mach-mtmips/mt7621/spl/launch.c
index 37c20a5..95dd659 100644
--- a/arch/mips/mach-mtmips/mt7621/spl/launch.c
+++ b/arch/mips/mach-mtmips/mt7621/spl/launch.c
@@ -70,7 +70,7 @@
 		cpumask = 0x0f;
 
 		/* Make BootROM/TPL redirect Core1's bootup flow to our entry point */
-		writel((uintptr_t)&_start, sysc + BOOT_SRAM_BASE_REG);
+		writel((uintptr_t)_start, sysc + BOOT_SRAM_BASE_REG);
 
 		bootup_secondary_core();
 	}