modify expand gpio tca6424'interrupt to respond Matrix Keyboard,At the same

modify expand gpio tca6424'interrupt to respond Matrix Keyboard,At the same
time separate soft interrupt from tca6424.c

Details:rk2818_info_defconfig default open soft interrupt and matrix keyboard.
board-infosdk.c modify I2C1 mode from IRQ to POLL,add member for struct
rk2818_tca6424_data, add  privata data for Matrix Keyboard.board.h modify
tca6424_platform_data.Kconfig and Makefile add soft interrupt Configuration.
soft_interrupt.c and tca6424.c are the main modify, they will not affect other
 modules.i2c-rk2818.c retain control SCL function for old tca6424 device,it
will remove later.Matrix Keyboard.c is modify based on kernel Matrix Keyboard.c
file.