ARM: omap1: drop unused Kconfig symbol

ARM: omap1: drop unused Kconfig symbol

"select ARCH_HAS_HOLES_MEMORYMODEL" was mistakenly merged here
due to a botched rebase (says Arnd [1]).

Drop that line since that symbol is not used anywhere else in the
kernel source tree.

[1] https://lore.kernel.org/all/5e335232-89b4-4c35-93bd-efad7e4d8995@app.fastmail.com/

Fixes: 7036440eab3e ("ARM: omap1: enable multiplatform")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Link: https://patch.msgid.link/20251230055230.3212260-1-rdunlap@infradead.org
Signed-off-by: Kevin Hilman <khilman@baylibre.com>