m68k: defconfig: hp300: Enable monochrome and 16-color linux logos

m68k: defconfig: hp300: Enable monochrome and 16-color linux logos

According to "HP 9000 Series 300 Computers: Video Signals and
Monitors"[1], HP Topcat and Catseye graphics hardware varieties support
monochrome, 16-color, 64-color, and 256-color displays.  Hence enable the
standard black-and-white and 16-color Linux logos, too.

[1] https://www.hp-series300.net/docs/monitors.pdf

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://patch.msgid.link/51190cab2bb1adb9554aaaba9fae54342653a338.1772446429.git.geert@linux-m68k.org