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2006-10-23[POWERPC] Add non-OF serial console supportMark A. Greer
Add serial console support for non-OF systems. There is a generic serial console layer which calls a serial console driver. Included is the serial console driver for the ns16550 class of uarts. Necessary support routines are added as well. Signed-off-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>