spi: sprd: Make sure offset not equal to slave address size

The slave register offset shouldn't equal to the max slave address
which ADI can support to access.
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lore.kernel.org/r/20210824070212.2089255-2-zhang.lyra@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-sprd-adi.c

@@ -119,7 +119,7 @@ struct sprd_adi {
 
 static int sprd_adi_check_addr(struct sprd_adi *sadi, u32 reg)
 {
-	if (reg > ADI_SLAVE_ADDR_SIZE) {
+	if (reg >= ADI_SLAVE_ADDR_SIZE) {
 		dev_err(sadi->dev,
 			"slave address offset is incorrect, reg = 0x%x\n",
 			reg);