post/board/lwmon5/gdc.c: Fix GCC 4.6 build warning

Fix:
gdc.c: In function 'gdc_test_reg_one':
gdc.c:66:6: warning: variable 'ret' set but not used
[-Wunused-but-set-variable]

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Acked-by: Stefan Roese <sr@denx.de>

post/board/lwmon5/gdc.c

@@ -63,13 +63,12 @@ const static unsigned long otherpattern = 0x01234567;
 /* test write/read og a given LIME Register */
 static int gdc_test_reg_one(uint value)
 {
-	int ret;
 	uint read_value;
 
 	/* write test pattern */
 	out_be32((void *)GDC_SCRATCH_REG, value);
 	/* read other location (protect against data lines capacity) */
-	ret = in_be32((void *)GDC_RAM_START);
+	in_be32((void *)GDC_RAM_START);
 	/* verify test pattern */
 	read_value = in_be32((void *)GDC_SCRATCH_REG);
 	if (read_value != value) {