update rk2928phonepad defconfig,open modem_sound and headset config
CONFIG_MISC_DEVICES=y
CONFIG_UID_STAT=y
CONFIG_APANIC=y
+CONFIG_MODEM_SOUND=y
CONFIG_3G_MODULE=y
CONFIG_SC6610=y
CONFIG_AUDIO_SWITCH=y
-CONFIG_GPIOEXP_AW9523B=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
CONFIG_SCSI_MULTI_LUN=y
CONFIG_I2C1_CONTROLLER_RK30=y
CONFIG_I2C2_CONTROLLER_RK30=y
CONFIG_ADC_RK30=y
+CONFIG_RK_HEADSET_DET=y
CONFIG_EXPANDED_GPIO_NUM=0
CONFIG_EXPANDED_GPIO_IRQ_NUM=0
CONFIG_SPI_FPGA_GPIO_NUM=0