soundwire: remove an unnecessary NULL check

The "bus" pointer isn't NULL so the address to a non-zero offset in
middle of "bus" cannot be NULL.  Delete the NULL check.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200923083235.GB1454948@mwanda
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/soundwire/generic_bandwidth_allocation.c

@@ -344,15 +344,11 @@ static int sdw_select_row_col(struct sdw_bus *bus, int clk_freq)
 static int sdw_compute_bus_params(struct sdw_bus *bus)
 {
 	unsigned int max_dr_freq, curr_dr_freq = 0;
-	struct sdw_master_prop *mstr_prop = NULL;
+	struct sdw_master_prop *mstr_prop = &bus->prop;
 	int i, clk_values, ret;
 	bool is_gear = false;
 	u32 *clk_buf;
 
-	mstr_prop = &bus->prop;
-	if (!mstr_prop)
-		return -EINVAL;
-
 	if (mstr_prop->num_clk_gears) {
 		clk_values = mstr_prop->num_clk_gears;
 		clk_buf = mstr_prop->clk_gears;