Kconfig: Remove trailing whitespace in its prompt

All errors are generated by ./tools/qconfig.py -b -j8 -i whatever.
Error look like this:
warning: SPL_CLK_CCF (defined at drivers/clk/Kconfig:59) has leading or
trailing whitespace in its prompt

Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/drivers/ddr/imx/imx8ulp/Kconfig b/drivers/ddr/imx/imx8ulp/Kconfig
index 5448c33..005f581 100644
--- a/drivers/ddr/imx/imx8ulp/Kconfig
+++ b/drivers/ddr/imx/imx8ulp/Kconfig
@@ -5,7 +5,7 @@
 	bool "imx8m dram"
 
 config IMX8ULP_DRAM_PHY_PLL_BYPASS
-	bool "Enable the DDR PHY PLL bypass mode, so PHY clock is from DDR_CLK "
+	bool "Enable the DDR PHY PLL bypass mode, so PHY clock is from DDR_CLK"
 	depends on IMX8ULP_DRAM
 
 config SAVED_DRAM_TIMING_BASE