ARM: vmlinux.lds: Refer to start of .data using _sdata rather than _data

Use _sdata as the start of the data section, rather than _data.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 5a82c39..f389171 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -491,7 +491,7 @@
 
 	kernel_code.start   = virt_to_phys(_text);
 	kernel_code.end     = virt_to_phys(_etext - 1);
-	kernel_data.start   = virt_to_phys(_data);
+	kernel_data.start   = virt_to_phys(_sdata);
 	kernel_data.end     = virt_to_phys(_end - 1);
 
 	for (i = 0; i < mi->nr_banks; i++) {