[POWERPC] Only offer CONFIG_BRIQ_PANEL if CONFIG_PPC_CHRP is enabled

since only the briQ has a briQ front panel, and the briQ is a CHRP and
is only supported if CONFIG_PPC_CHRP is set.
Signed-off-by: Paul Mackerras <paulus@samba.org>

drivers/char/Kconfig

@@ -497,7 +497,7 @@ config LEGACY_PTY_COUNT
 
 config BRIQ_PANEL
 	tristate 'Total Impact briQ front panel driver'
-	depends on PPC
+	depends on PPC_CHRP
 	---help---
 	  The briQ is a small footprint CHRP computer with a frontpanel VFD, a
 	  tristate led and two switches. It is the size of a CDROM drive.