MAINTAINERS: update Ard's email address to @kernel.org

Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index cba1095..cc9f02a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6003,14 +6003,14 @@
 EFI TEST DRIVER
 L:	linux-efi@vger.kernel.org
 M:	Ivan Hu <ivan.hu@canonical.com>
-M:	Ard Biesheuvel <ard.biesheuvel@linaro.org>
+M:	Ard Biesheuvel <ardb@kernel.org>
 S:	Maintained
 F:	drivers/firmware/efi/test/
 
 EFI VARIABLE FILESYSTEM
 M:	Matthew Garrett <matthew.garrett@nebula.com>
 M:	Jeremy Kerr <jk@ozlabs.org>
-M:	Ard Biesheuvel <ard.biesheuvel@linaro.org>
+M:	Ard Biesheuvel <ardb@kernel.org>
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git
 L:	linux-efi@vger.kernel.org
 S:	Maintained
@@ -6189,7 +6189,7 @@
 F:	security/integrity/evm/
 
 EXTENSIBLE FIRMWARE INTERFACE (EFI)
-M:	Ard Biesheuvel <ard.biesheuvel@linaro.org>
+M:	Ard Biesheuvel <ardb@kernel.org>
 L:	linux-efi@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi.git
 S:	Maintained
@@ -15006,7 +15006,7 @@
 F:	drivers/staging/media/soc_camera/
 
 SOCIONEXT SYNQUACER I2C DRIVER
-M:	Ard Biesheuvel <ard.biesheuvel@linaro.org>
+M:	Ard Biesheuvel <ardb@kernel.org>
 L:	linux-i2c@vger.kernel.org
 S:	Maintained
 F:	drivers/i2c/busses/i2c-synquacer.c