Move text-drawing code into firmware-drivers/lcd-bitmap-common.c, included by the various driver files.
Add new static function LCDFN(putsxyofs_style) to draw styled text, and use it in both LCDFN(puts_style_offset) and LCDFN(scroll_fn).
Merge lcd_gradient_rect functions, with new function containing simplified code for drawing one line of a multi-line gradient.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22289 a1c6a512-1295-4272-9138-f99709370657
