bsp: k230: add gpio driver

K230 supports 3 GPIO groups:
group0: GPIO0  ~ GPIO31, support i/o and irq
group1: GPIO32 ~ GPIO63, support i/o and irq
group2: GPIO64 ~ GPIO71, only support i/o.

Signed-off-by: Chen Wang <unicorn_wang@outlook.com>

Author: unicornx

bsp/k230/drivers/interdrv/gpio/SConscript

@@ -0,0 +1,11 @@
+# RT-Thread building script for component
+
+from building import *
+
+cwd     = GetCurrentDir()
+src     = Glob('*.c')
+CPPPATH = [cwd]
+
+group = DefineGroup('GPIO', src, depend = [], CPPPATH = CPPPATH)
+
+Return('group')