regmap: mmio: remove some error checks now in the core

These error checks are implemented in regmap core. Remove the duplicate
code from regmap-mmio.c

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/base/regmap/regmap-mmio.c

@@ -37,9 +37,6 @@ static int regmap_mmio_gather_write(void *context,
 
 	BUG_ON(reg_size != 4);
 
-	if (val_size % ctx->val_bytes)
-		return -EIO;
-
 	offset = be32_to_cpup(reg);
 
 	while (val_size) {
@@ -86,9 +83,6 @@ static int regmap_mmio_read(void *context,
 
 	BUG_ON(reg_size != 4);
 
-	if (val_size % ctx->val_bytes)
-		return -EIO;
-
 	offset = be32_to_cpup(reg);
 
 	while (val_size) {