mtd: rawnand: omap_elm: Fix elm_init definition

The macro ELM_BASE is defined in mach/hardware.h and is
not visible at the omap_elm.h header file. Avoid using it
in omap_elm.h.

Reported-by: Hong Guan <hguan@ti.com>
Fixes: 7363cf05 ("mtd: rawnand: omap_elm: u-boot driver model support")
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/all/20231211114600.4414-3-rogerq@kernel.org


Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>