scsi: MAINTAINERS: Update UFS Exynos entry

Add myself as a reviewer for ufs-exynos as I'm doing various work in
this driver currently for gs101 SoC and would like to help review
relevant patches.

Additionally add the linux-samsung-soc@vger.kernel.org list as that is
relevant to this driver.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20241031150033.3440894-15-peter.griffin@linaro.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: petegriffin

MAINTAINERS

@@ -23816,7 +23816,9 @@ F:	drivers/ufs/host/*dwc*
 
 UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER EXYNOS HOOKS
 M:	Alim Akhtar <alim.akhtar@samsung.com>
+R:	Peter Griffin <peter.griffin@linaro.org>
 L:	linux-scsi@vger.kernel.org
+L:	linux-samsung-soc@vger.kernel.org
 S:	Maintained
 F:	drivers/ufs/host/ufs-exynos*