remoteproc: fix spelling mistake "Peripherial" -> "Peripherial" in Kconfig

There is a spelling mistake in the Kconfig help text. Fix it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201204193411.1152006-1-colin.king@canonical.com


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>