defconfig: msm8974-perf: enable SMB349 charger driver support

SMB349 is a single path switching mode charger chip. Enable the
driver on msm8974 based devices.

Change-Id: I5e13018b636cdb48da698f83d7f7a3197384d176
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>