spi-v2.0: Phytium: fix uninitialized ret in spi_phytium_write

drivers/spi/spi-phytium-common.c:333:7: error: variable 'ret' is uninitialized when used here [-Werror,-Wuninitialized]
   333 |                 if (ret) {
       |                     ^~~
   CC [M]  drivers/input/serio/pcips2.o
 drivers/spi/spi-phytium-common.c:325:9: note: initialize the variable 'ret' to silence this warning
   325 |         int ret;
       |                ^
       |                 = 0
1 error generated.

Signed-off-by: Wentao Guan <guanwentao@uniontech.com>

Author: opsiff

drivers/spi/spi-phytium-common.c

@@ -322,7 +322,7 @@ EXPORT_SYMBOL_GPL(spi_phytium_flash_write);
 int spi_phytium_write(struct phytium_spi *fts, u8 cs, u8 dfs, u8 mode,
 		u8 tmode, u8 flags, u8 spi_write_flag)
 {
-	int ret;
+	int ret = 0;
 	u32 len;
 	u64 smem_tx;
 	u8 first = 1;