MAINTAINERS: Update section for cpuidle-psci

Add myself as a co-maintainer for the cpuidle-psci driver and the
corresponding git-tree, which I am already using for this.

Cc: Lorenzo Pieralisi <[email protected]>
Cc: Sudeep Holla <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
Acked-by: Sudeep Holla <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: storulf

MAINTAINERS

@@ -6087,9 +6087,11 @@ F:	include/linux/platform_data/cpuidle-exynos.h
 CPUIDLE DRIVER - ARM PSCI
 M:	Lorenzo Pieralisi <[email protected]>
 M:	Sudeep Holla <[email protected]>
+M:	Ulf Hansson <[email protected]>
 L:	[email protected]
 L:	[email protected] (moderated for non-subscribers)
 S:	Supported
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm.git
 F:	drivers/cpuidle/cpuidle-psci.c
 
 CPUIDLE DRIVER - ARM PSCI PM DOMAIN