soc/amd/stoneyridge: Remove "else" after a return

File ramtop.c has one instance of if()/else where the if tests for top mem
in lower 4GiB, and returns just before the "else" statement. These "else"
statements are not needed.

BUG=b:117648025
TEST=Build and boot grunt.

Change-Id: Iba16a416e78dae75a95a11d38179161c5a11b2ad
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/29247
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/stoneyridge/ramtop.c

@@ -63,11 +63,11 @@ void *cbmem_top(void)
 
 	if (!tom.lo)
 		return 0;
-	else
-		/* 8MB alignment to keep MTRR usage low */
-		return (void *)ALIGN_DOWN(restore_top_of_low_cacheable()
-				- CONFIG_SMM_TSEG_SIZE
-				- BERT_REGION_MAX_SIZE, 8*MiB);
+
+	/* 8MB alignment to keep MTRR usage low */
+	return (void *)ALIGN_DOWN(restore_top_of_low_cacheable()
+			- CONFIG_SMM_TSEG_SIZE
+			- BERT_REGION_MAX_SIZE, 8*MiB);
 }
 
 static uintptr_t smm_region_start(void)