spi: altera: Clean up most checkpatch issues

spi: altera: Clean up most checkpatch issues

This patch just zaps most of the checkpatch cries present in the
driver. There is one more left, which will be addressed separately.
There is no functional change.

This patch also adds a bunch of newlines all around the place, this
is to make the code much more readable.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Pavel Machek <pavel@denx.de>
Acked-by: Pavel Machek <pavel@denx.de>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>