input: mpu3050: make sample rate configurable, and use interrupt

Required by 8x30 platform

Change-Id: I51b39e1ee5e367fd72151854e3d421538074d6d6
Signed-off-by: Wentao Xu <wentaox@codeaurora.org>
diff --git a/arch/arm/mach-msm/board-8930.c b/arch/arm/mach-msm/board-8930.c
index b80d62d..4fce029 100644
--- a/arch/arm/mach-msm/board-8930.c
+++ b/arch/arm/mach-msm/board-8930.c
@@ -2431,6 +2431,7 @@
 static struct i2c_board_info __initdata mpu3050_i2c_boardinfo[] = {
 	{
 		I2C_BOARD_INFO("mpu3050", 0x68),
+		.irq = MSM_GPIO_TO_INT(MPU3050_INT_GPIO),
 		.platform_data = &mpu3050_gyro,
 	},
 };