MAINTAINERS: Change list for ioc_serial to linux-serial.

IOC3 is also being used on SGI MIPS systems but this particular driver is
only being used on IA64 systems so linux-mips made no sense as a list. Pat
also thinks [e-mail] is the better list.

Signed-off-by: Ralf Baechle <[e-mail]>

MAINTAINERS

···
 
 IOC3 SERIAL DRIVER
 M:	Pat Gefre <[e-mail]>
-L:	[e-mail]
+L:	[e-mail]
 S:	Maintained
 F:	drivers/serial/ioc3_serial.c