staging/fbtft: Fix braces coding style

Add braces to the "for" loop. This way, the kernel coding style is
followed.

Signed-off-by: Len Baker <len.baker@gmx.com>
Link: https://lore.kernel.org/r/20210801085155.3170-4-len.baker@gmx.com


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