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/clk/Kconfig b/drivers/clk/Kconfig
index 017dd26..bda6873 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -57,27 +57,27 @@
 	  Enable this to support the clocks
 
 config SPL_CLK_CCF
-	bool "SPL Common Clock Framework [CCF] support "
+	bool "SPL Common Clock Framework [CCF] support"
 	depends on SPL
 	help
 	  Enable this option if you want to (re-)use the Linux kernel's Common
 	  Clock Framework [CCF] code in U-Boot's SPL.
 
 config SPL_CLK_COMPOSITE_CCF
-	bool "SPL Common Clock Framework [CCF] composite clk support "
+	bool "SPL Common Clock Framework [CCF] composite clk support"
 	depends on SPL_CLK_CCF
 	help
 	  Enable this option if you want to (re-)use the Linux kernel's Common
 	  Clock Framework [CCF] composite code in U-Boot's SPL.
 
 config CLK_CCF
-	bool "Common Clock Framework [CCF] support "
+	bool "Common Clock Framework [CCF] support"
 	help
 	  Enable this option if you want to (re-)use the Linux kernel's Common
 	  Clock Framework [CCF] code in U-Boot's clock driver.
 
 config CLK_COMPOSITE_CCF
-	bool "Common Clock Framework [CCF] composite clk support "
+	bool "Common Clock Framework [CCF] composite clk support"
 	depends on CLK_CCF
 	help
 	  Enable this option if you want to (re-)use the Linux kernel's Common
@@ -164,7 +164,7 @@
 	  Enable this to support the clocks on Octeon MIPS platforms.
 
 config SANDBOX_CLK_CCF
-	bool "Sandbox Common Clock Framework [CCF] support "
+	bool "Sandbox Common Clock Framework [CCF] support"
 	depends on SANDBOX
 	select CLK_CCF
 	help