Minor fix for a missing preposition in the error message that appears
when there are too many reserved memory regions for the allocated array
to store.
Signed-off-by: NDanny Lin <danny@kdrag0n.dev>
Link: https://lore.kernel.org/r/20200604054900.200317-1-danny@kdrag0n.devSigned-off-by: NRob Herring <robh@kernel.org>