MAINTAINERS: Use my kernel.org email

Use the kernel.org email I have for reviewing patches.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20220718151243.1149442-1-p.yadav@ti.com

MAINTAINERS

@@ -18827,7 +18827,7 @@ F:	drivers/pinctrl/spear/
 
 SPI NOR SUBSYSTEM
 M:	Tudor Ambarus <tudor.ambarus@microchip.com>
-M:	Pratyush Yadav <p.yadav@ti.com>
+M:	Pratyush Yadav <pratyush@kernel.org>
 R:	Michael Walle <michael@walle.cc>
 L:	linux-mtd@lists.infradead.org
 S:	Maintained