defconfig: msm: enable CONFIG_USB_RTL8152 for sm6150

Enable config for Realtek RTL8152/RTL8153 based USB Ethernet
Adapters for sm6150 target. This is to align them with
android base config.

Change-Id: I70d2f6b2b779ebba78cda3b0353fe3d4ba027291
Signed-off-by: Naitik Bharadiya <bharad@codeaurora.org>