linux: Add missing config options to generic configs

These missing options have been noticed while enabling the following
configuration options on ipq806x, but they're available in the standard
kernel:
*ARCH_QCOM
*CONFIG_USB_SUPPORT
*CONFIG_USB_DWC3
*CONFIG_MFD_SYSCON

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

SVN-Revision: 45256