MAINTAINERS: Fix a linusw mail address

The patch adding me to the SoC maintainers was in-flight at the
time I had to change my mail address. This fixes it up.

Signed-off-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20251216-maintainers-fix-v1-1-92f11231b27e@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Author: linusw

MAINTAINERS

@@ -2011,7 +2011,7 @@ ARM AND ARM64 SoC SUB-ARCHITECTURES (COMMON PARTS)
 M:	Arnd Bergmann <arnd@arndb.de>
 M:	Krzysztof Kozlowski <krzk@kernel.org>
 M:	Alexandre Belloni <alexandre.belloni@bootlin.com>
-M:	Linus Walleij <linus.walleij@linaro.org>
+M:	Linus Walleij <linusw@kernel.org>
 R:	Drew Fustini <fustini@kernel.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 L:	soc@lists.linux.dev