treewide/Kconfig: Drop unneeded empty lines

Change-Id: If8aa28a22625b7b2cf9b58958de87ee752f637f6
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45247
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

payloads/libpayload/arch/x86/Kconfig

@@ -52,5 +52,4 @@ config DIE_ON_UNKNOWN_INTERRUPT
 
 endchoice
 
-
 endif