MIPS: BMIPS: Add support PWM device nodes

Adds PWM device nodes to BCM7xxx MIPS based SoCs.

Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jonas Gorski <jonas.gorski@gmail.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: MIPS Mailing List <linux-mips@linux-mips.org>
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14000/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/boot/dts/brcm/bcm97125cbmb.dts

@@ -45,6 +45,10 @@
 	status = "okay";
 };
 
+&pwma {
+	status = "okay";
+};
+
 /* FIXME: USB is wonky; disable it for now */
 &ehci0 {
 	status = "disabled";