x86/intel/quark: Fix simple_return.cocci warnings

arch/x86/platform/intel-quark/imr.c:129:1-4: WARNING: end returns can be simpified

 Simplify a trivial if-return sequence.  Possibly combine with a preceding function call.

Generated by: scripts/coccinelle/misc/simple_return.cocci
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Andy Shevchenko <andy.schevchenko@gmail.com>
Cc: Ong, Boon Leong <boon.leong.ong@intel.com>
Cc: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Cc: Darren Hart <dvhart@linux.intel.com>
Cc: kbuild-all@01.org
Link: http://lkml.kernel.org/r/20150219081432.GA21996@waimeaSigned-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/platform/intel-quark/imr.c

@@ -126,12 +126,8 @@ static int imr_read(struct imr_device *idev, u32 imr_id, struct imr_regs *imr)
 	if (ret)
 		return ret;
 
-	ret = iosf_mbi_read(QRK_MBI_UNIT_MM, QRK_MBI_MM_READ,
+	return iosf_mbi_read(QRK_MBI_UNIT_MM, QRK_MBI_MM_READ,
 				reg++, &imr->wmask);
-	if (ret)
-		return ret;
-
-	return 0;
 }
 
 /**