FRV: Remove some dead code

Remove some dead chunks of code that are bounded by preprocessor conditionals
controlled by apparently no-longer available config options.

These are:

	CONFIG_BLK_DEV_BLKMEM
	CONFIG_CHR_DEV_FLASH
	CONFIG_BLK_DEV_FLASH
	CONFIG_CONSOLE

[Found by Robert P. J. Day <rpjday@mindspring.com>]

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>