Blackfin arch: extract gpio number from PIN function

Singed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index d9284d7..0d1e87b 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -902,7 +902,9 @@
  */
 void bfin_gpio_reset_spi0_ssel1(void)
 {
-	port_setup(P_SPI0_SSEL1, GPIO_USAGE);
-	gpio_bankb[gpio_bank(P_SPI0_SSEL1)]->data_set = gpio_bit(P_SPI0_SSEL1);
+	u16 gpio = P_IDENT(P_SPI0_SSEL1);
+
+	port_setup(gpio, GPIO_USAGE);
+	gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
 	udelay(1);
 }