MAINTAINERS: Update email address for Qualcomm's I2C GENI maintainers

Update email address to @oss.qualcomm.com for both the maintainers
from qualcomm, Viken dadhani and Mukesh Kumar Savaliya.

Signed-off-by: Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>