i2c: riic: Simplify unsupported bus speed handling

Simplify checking for unsupported bus speeds and reporting errors by
factoring out the calculation of the maximum bus speed, and by using the
dev_err_probe() helper.

While at it, use "%u" for u32, and improve the error message.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Claudiu Beznea <[e-mail]>
Tested-by: Claudiu Beznea <[e-mail]>
Reviewed-by: Wolfram Sang <[e-mail]>
Signed-off-by: Andi Shyti <[e-mail]>

drivers/i2c/busses/i2c-riic.c

···
 	struct i2c_timings *t = &riic->i2c_t;
 	struct device *dev = riic->adapter.dev.parent;
 	bool fast_mode_plus = riic->info->fast_mode_plus;
+	u32 max_freq = fast_mode_plus ? I2C_MAX_FAST_MODE_PLUS_FREQ
+				      : I2C_MAX_FAST_MODE_FREQ;
 
-	if ((!fast_mode_plus && t->bus_freq_hz > I2C_MAX_FAST_MODE_FREQ) ||
-	    (fast_mode_plus && t->bus_freq_hz > I2C_MAX_FAST_MODE_PLUS_FREQ)) {
-		dev_err(&riic->adapter.dev,
-			"unsupported bus speed (%dHz). %d max\n",
-			t->bus_freq_hz,
-			fast_mode_plus ? I2C_MAX_FAST_MODE_PLUS_FREQ :
-					 I2C_MAX_FAST_MODE_FREQ);
-		return -EINVAL;
-	}
+	if (t->bus_freq_hz > max_freq)
+		return dev_err_probe(&riic->adapter.dev, -EINVAL,
+				     "unsupported bus speed %uHz (%u max)\n",
+				     t->bus_freq_hz, max_freq);
 
 	rate = clk_get_rate(riic->clk);