MAINTAINERS: update second Socionext SPI maintainer address

The Linaro address is bouncing so switch to Jassi's gmail address also
found in MAINTAINERS.

Cc: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260410083423.504695-3-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: jhovold

MAINTAINERS

@@ -24466,7 +24466,7 @@ F:	drivers/net/ethernet/socionext/netsec.c
 
 SOCIONEXT (SNI) Synquacer SPI DRIVER
 M:	Masahisa Kojima <kojima.masahisa@socionext.com>
-M:	Jassi Brar <jaswinder.singh@linaro.org>
+M:	Jassi Brar <jassisinghbrar@gmail.com>
 L:	linux-spi@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/spi/socionext,synquacer-spi.yaml