MAINTAINERS: add 's32@nxp.com' as relevant mailing list for 'sdhci-esdhc-imx' driver

Since NXP S32G2 and S32G3 SoCs share the SDHCI controller with
I.MX platforms it would be valuable to add 's32@nxp.com' as a
relevant mailing list in this area.
Signed-off-by: Ciprian Costea <ciprianmarian.costea@oss.nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Haibo Chen <haibo.chen@nxp.com>
Link: https://lore.kernel.org/r/20240708121018.246476-4-ciprianmarian.costea@oss.nxp.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

MAINTAINERS

@@ -20098,6 +20098,7 @@ SECURE DIGITAL HOST CONTROLLER INTERFACE (SDHCI) NXP i.MX DRIVER
 M:	Haibo Chen <haibo.chen@nxp.com>
 L:	imx@lists.linux.dev
 L:	linux-mmc@vger.kernel.org
+L:	s32@nxp.com
 S:	Maintained
 F:	drivers/mmc/host/sdhci-esdhc-imx.c