media: venus: fix build on 32bit environments

As reported by jenkins@linuxtv.org, the build with i386 fails
with:

	ld: drivers/media/platform/qcom/venus/helpers.o: in function `venus_helper_load_scale_clocks':
	(.text+0x1d77): undefined reference to `__udivdi3'
	ld: (.text+0x1dce): undefined reference to `__udivdi3'
	make: *** [Makefile:1094: vmlinux] Error 1

That's because it divides an u32 bit integer by a u64 one.
Reviewed-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/qcom/venus/helpers.c

@@ -520,10 +520,11 @@ static unsigned long calculate_inst_freq(struct venus_inst *inst,
 					 unsigned long filled_len)
 {
 	unsigned long vpp_freq = 0, vsp_freq = 0;
-	u64 fps = inst->fps;
+	u32 fps = (u32)inst->fps;
 	u32 mbs_per_sec;
 
-	mbs_per_sec = load_per_instance(inst) / inst->fps;
+	mbs_per_sec = load_per_instance(inst) / fps;
+
 	vpp_freq = mbs_per_sec * inst->clk_data.codec_freq_data->vpp_freq;
 	/* 21 / 20 is overhead factor */
 	vpp_freq += vpp_freq / 20;