MAINTAINERS: Update Ley Foon Tan's email address

@altera.com email is going to removed. Change to @intel.com email.
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>

MAINTAINERS

@@ -720,7 +720,7 @@ F:	Documentation/devicetree/bindings/i2c/i2c-altera.txt
 F:	drivers/i2c/busses/i2c-altera.c
 
 ALTERA MAILBOX DRIVER
-M:	Ley Foon Tan <lftan@altera.com>
+M:	Ley Foon Tan <ley.foon.tan@intel.com>
 L:	nios2-dev@lists.rocketboards.org (moderated for non-subscribers)
 S:	Maintained
 F:	drivers/mailbox/mailbox-altera.c
@@ -11680,7 +11680,7 @@ F:	Documentation/scsi/NinjaSCSI.txt
 F:	drivers/scsi/nsp32*
 
 NIOS2 ARCHITECTURE
-M:	Ley Foon Tan <lftan@altera.com>
+M:	Ley Foon Tan <ley.foon.tan@intel.com>
 L:	nios2-dev@lists.rocketboards.org (moderated for non-subscribers)
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2.git
 S:	Maintained
@@ -12564,7 +12564,7 @@ F:	Documentation/devicetree/bindings/pci/aardvark-pci.txt
 F:	drivers/pci/controller/pci-aardvark.c
 
 PCI DRIVER FOR ALTERA PCIE IP
-M:	Ley Foon Tan <lftan@altera.com>
+M:	Ley Foon Tan <ley.foon.tan@intel.com>
 L:	rfi@lists.rocketboards.org (moderated for non-subscribers)
 L:	linux-pci@vger.kernel.org
 S:	Supported
@@ -12743,7 +12743,7 @@ S:	Supported
 F:	Documentation/PCI/pci-error-recovery.rst
 
 PCI MSI DRIVER FOR ALTERA MSI IP
-M:	Ley Foon Tan <lftan@altera.com>
+M:	Ley Foon Tan <ley.foon.tan@intel.com>
 L:	rfi@lists.rocketboards.org (moderated for non-subscribers)
 L:	linux-pci@vger.kernel.org
 S:	Supported