include/linux/miscdevice.h - Fix typo/grammar

Improve the clarity and grammar of descriptive comment on top of the
minor number assignments.

Fix a typo within 2 comments for macros.
s/This helps in eleminating of boilerplate code.
 /This helps to eliminate boilerplate code./

Signed-off-by: Sebastian Fricke <sebastian.fricke.linux@gmail.com>
Link: https://lore.kernel.org/r/20200803054346.4285-1-sebastian.fricke.linux@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>