ACPICA: Update information in MAINTAINERS

Update the ACPICA information in MAINTAINERS to reflect recent
maintainership changes.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

MAINTAINERS

@@ -321,7 +321,7 @@ F:	drivers/acpi/apei/
 
 ACPI COMPONENT ARCHITECTURE (ACPICA)
 M:	Robert Moore <robert.moore@intel.com>
-M:	Lv Zheng <lv.zheng@intel.com>
+M:	Erik Schmauss <erik.schmauss@intel.com>
 M:	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
 L:	linux-acpi@vger.kernel.org
 L:	devel@acpica.org