Staging: sm750fb: Fix basic coding style issues

The word "enought" was changed to read as "enough".
In addition to this, there was a missing new-line after varaible
declarations within a function.

Signed-off-by: Timo A. Aranjo <timo.aranjo@aol.com>
Link: https://lore.kernel.org/r/20200826012101.12162-1-timo.aranjo@aol.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>