scsi: MAINTAINERS: Update dwc driver maintainer to Pedro Sousa

Currently I am managing the Synopsys drivers & tools team (full-time)
and so I am passing the DWC UFS driver maintenance to Pedro Sousa.

Signed-off-by: Joao Pinto <joao.pinto@synopsys.com>
Cc: Pedro Sousa <pedrom.sousa@synopsys.com>
Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: Alex Lemberg <Alex.Lemberg@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>