[PARISC] Do not allow STI_CONSOLE to be modular

It doesn't really make much sense, anyways, and would need a pile of
symbols exported.
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

drivers/video/console/Kconfig

@@ -145,7 +145,7 @@ config FRAMEBUFFER_CONSOLE_ROTATION
          oriented.
 
 config STI_CONSOLE
-        tristate "STI text console" 
+        bool "STI text console"
         depends on PARISC
         default y
         help