MIPS: Enable kmemleak for MIPS

Signed-off-by: Maxin B. John <maxin.john@gmail.com>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Daniel Baluta <dbaluta@ixiacom.com>
Cc: naveen yadav <yad.naveen@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Patchwork: https://patchwork.linux-mips.org/patch/2244/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/vmlinux.lds.S

@@ -68,6 +68,7 @@ SECTIONS
 	RODATA
 
 	/* writeable */
+	_sdata = .;				/* Start of data section */
 	.data : {	/* Data */
 		. = . + DATAOFFSET;		/* for CONFIG_MAPPED_KERNEL */