gpio: stm32_gpio: move base addresses to the soc file

Base addresses for GPIOs could be different for different socs, this
patch moves the base addresses from driver to the soc specific location.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
diff --git a/arch/arm/include/asm/arch-stm32f1/stm32.h b/arch/arm/include/asm/arch-stm32f1/stm32.h
index 4094a75..1af73c5 100644
--- a/arch/arm/include/asm/arch-stm32f1/stm32.h
+++ b/arch/arm/include/asm/arch-stm32f1/stm32.h
@@ -24,6 +24,14 @@
 
 #define STM32_BUS_MASK		0xFFFF0000
 
+#define STM32_GPIOA_BASE	(STM32_APB2PERIPH_BASE + 0x0800)
+#define STM32_GPIOB_BASE	(STM32_APB2PERIPH_BASE + 0x0C00)
+#define STM32_GPIOC_BASE	(STM32_APB2PERIPH_BASE + 0x1000)
+#define STM32_GPIOD_BASE	(STM32_APB2PERIPH_BASE + 0x1400)
+#define STM32_GPIOE_BASE	(STM32_APB2PERIPH_BASE + 0x1800)
+#define STM32_GPIOF_BASE	(STM32_APB2PERIPH_BASE + 0x1C00)
+#define STM32_GPIOG_BASE	(STM32_APB2PERIPH_BASE + 0x2000)
+
 /*
  * Register maps
  */