tty: serial: bcm63xx: Allow bcm63xx_uart to be built on other platforms

This device was originally supported on bcm63xx only, but it shows up on
a wide variety of MIPS and ARM chipsets spanning multiple product lines.
Now that the driver has eliminated dependencies on bcm63xx-specific
header files, we can build it on any non-bcm63xx kernel.

Compile-tested on x86, both statically and as a module.  Tested for
functionality on bcm3384 (a new MIPS platform under active development).
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/Kconfig

@@ -1283,7 +1283,7 @@ config SERIAL_TIMBERDALE
 config SERIAL_BCM63XX
 	tristate "bcm63xx serial port support"
 	select SERIAL_CORE
-	depends on BCM63XX
+	depends on MIPS || ARM || COMPILE_TEST
 	help
 	  If you have a bcm63xx CPU, you can enable its onboard
 	  serial port by enabling this options.