MAINTAINERS: Update entry for Intel Broxton PMC driver

The driver lives now under MFD so split the current entry into two parts
and add me as co-maintainer of the Intel Broxton PMC driver. While there
correct formatting of Zha Qipeng's email address.

Signed-off-by: Mika Westerberg <[e-mail]>
Reviewed-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

MAINTAINERS

···
 S:	Maintained
 F:	drivers/platform/x86/intel_atomisp2_pm.c
 
+INTEL BROXTON PMC DRIVER
+M:	Mika Westerberg <[e-mail]>
+M:	Zha Qipeng <[e-mail]>
+S:	Maintained
+F:	drivers/mfd/intel_pmc_bxt.c
+F:	include/linux/mfd/intel_pmc_bxt.h
+
 INTEL C600 SERIES SAS CONTROLLER DRIVER
 M:	Intel SCU Linux support <[e-mail]>
 M:	Artur Paszkiewicz <[e-mail]>
···
 F:	include/uapi/linux/mic_ioctl.h
 F:	include/uapi/linux/scif_ioctl.h
 
+INTEL P-Unit IPC DRIVER
+M:	Zha Qipeng <[e-mail]>
+L:	[e-mail]
+S:	Maintained
+F:	arch/x86/include/asm/intel_punit_ipc.h
+F:	drivers/platform/x86/intel_punit_ipc.c
+
 INTEL PMC CORE DRIVER
 M:	Rajneesh Bhardwaj <[e-mail]>
 M:	Vishwanath Somayaji <[e-mail]>
 L:	[e-mail]
 S:	Maintained
 F:	drivers/platform/x86/intel_pmc_core*
-
-INTEL PMC/P-Unit IPC DRIVER
-M:	Zha Qipeng<[e-mail]>
-L:	[e-mail]
-S:	Maintained
-F:	arch/x86/include/asm/intel_pmc_ipc.h
-F:	arch/x86/include/asm/intel_punit_ipc.h
-F:	drivers/platform/x86/intel_pmc_ipc.c
-F:	drivers/platform/x86/intel_punit_ipc.c
 
 INTEL PMIC GPIO DRIVERS
 M:	Andy Shevchenko <[e-mail]>