scsi: ufs-qcom: update configuration option of SCSI_UFS_QCOM component

The following combination of components, when SCSI_UFS_QCOM=y
and PHY_QCOM_UFS=m is illegal and causes build errors.
This patch enables the SCSI_UFS_QCOM component to
be compiled as a module. So now, compiling SCSI_UFS_QCOM=m
forces PHY_QCOM_UFS=m, and SCSI_UFS_QCOM=y forces PHY_QCOM_UFS=y.

Change-Id: Ifce9085184f2f54a29c94789b9005ecd8fc1a119
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>