MAINTAINERS: Update Broadcom Vulcan maintainer email

Update Broadcom Vulcan maintainer's email address, the broadcom.com
address is no longer valid.
Signed-off-by: Jayachandran C <c.jayachandran@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

MAINTAINERS

@@ -2752,7 +2752,7 @@ S:	Supported
 F:	drivers/net/ethernet/broadcom/bcmsysport.*
 
 BROADCOM VULCAN ARM64 SOC
-M:	Jayachandran C. <jchandra@broadcom.com>
+M:	Jayachandran C. <c.jayachandran@gmail.com>
 M:	bcm-kernel-feedback-list@broadcom.com
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained