dt-bindings: pinctrl: stm32: add new entry for package information

Add "st,package" entry. Possibles values are:
-STM32MP_PKG_AA for LFBGA448 (18*18) package
-STM32MP_PKG_AB for LFBGA354 (16*16) package
-STM32MP_PKG_AC for TFBGA361 (12*12) package
-STM32MP_PKG_AD for TFBGA257 (10*10) package

Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.txt

@@ -57,6 +57,8 @@ Optional properties:
  - st,bank-ioport: should correspond to the EXTI IOport selection (EXTI line
    used to select GPIOs as interrupts).
  - hwlocks: reference to a phandle of a hardware spinlock provider node.
+ - st,package: Indicates the SOC package used.
+   More details in include/dt-bindings/pinctrl/stm32-pinfunc.h
 
 Example 1:
 #include <dt-bindings/pinctrl/stm32f429-pinfunc.h>

include/dt-bindings/pinctrl/stm32-pinfunc.h

@@ -32,5 +32,11 @@
 
 #define STM32_PINMUX(port, line, mode) (((PIN_NO(port, line)) << 8) | (mode))
 
+/*  package information */
+#define STM32MP_PKG_AA	0x1
+#define STM32MP_PKG_AB	0x2
+#define STM32MP_PKG_AC	0x4
+#define STM32MP_PKG_AD	0x8
+
 #endif /* _DT_BINDINGS_STM32_PINFUNC_H */