MIPS: BMIPS: Adjust mips-hpt-frequency for BCM7435

The CPU actually runs at 1405Mhz which gives us a 175625000 Hz MIPS timer
frequency (CPU frequency / 8).

Fixes: e4c7d009 ("MIPS: BMIPS: Add BCM7435 dtsi")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: john@phrozen.org
Cc: cernekee@gmail.com
Cc: jaedon.shin@gmail.com
Patchwork: https://patchwork.linux-mips.org/patch/13132/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/boot/dts/brcm/bcm7435.dtsi

@@ -7,7 +7,7 @@ cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		mips-hpt-frequency = <163125000>;
+		mips-hpt-frequency = <175625000>;
 
 		cpu@0 {
 			compatible = "brcm,bmips5200";