board/genietv/flash.c: Fix flash initialization

board/genietv/flash.c: Fix flash initialization

The GENIETV has only one NOR flash bank.  Remove all code trying to
deal with a second bank.  This also fixes a number of GCC 4.6 build
warnings:
flash.c:65:12: warning: array subscript is above array bounds
[-Warray-bounds]
flash.c:66:12: warning: array subscript is above array bounds
[-Warray-bounds]
flash.c:69:12: warning: array subscript is above array bounds
[-Warray-bounds]
flash.c:183:2: warning: format '%x' expects argument of type 'unsigned
int', but argument 2 has type '

Signed-off-by: Wolfgang Denk <wd@denx.de>