pinctrl: stmfx: update pin name

Update pin name to avoid duplicated name with SOC GPIO
gpio0...gpio15 / agpio0....agpio7: add a stmfx prefix.

This pin name can be used in pinmux command.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/drivers/pinctrl/pinctrl-stmfx.c b/drivers/pinctrl/pinctrl-stmfx.c
index b789f36..a62be44 100644
--- a/drivers/pinctrl/pinctrl-stmfx.c
+++ b/drivers/pinctrl/pinctrl-stmfx.c
@@ -343,8 +343,8 @@
 }
 
 /*
- * STMFX pins[15:0] are called "gpio[15:0]"
- * and STMFX pins[23:16] are called "agpio[7:0]"
+ * STMFX pins[15:0] are called "stmfx_gpio[15:0]"
+ * and STMFX pins[23:16] are called "stmfx_agpio[7:0]"
  */
 #define MAX_PIN_NAME_LEN 7
 static char pin_name[MAX_PIN_NAME_LEN];
@@ -352,9 +352,9 @@
 					      unsigned int selector)
 {
 	if (selector < STMFX_MAX_GPIO)
-		snprintf(pin_name, MAX_PIN_NAME_LEN, "gpio%u", selector);
+		snprintf(pin_name, MAX_PIN_NAME_LEN, "stmfx_gpio%u", selector);
 	else
-		snprintf(pin_name, MAX_PIN_NAME_LEN, "agpio%u", selector - 16);
+		snprintf(pin_name, MAX_PIN_NAME_LEN, "stmfx_agpio%u", selector - 16);
 	return pin_name;
 }