UBUNTU: SAUCE: x86: Remove double include

CVE-2018-3639 (x86)

Fixes: f3b21b13 ("UBUNTU: SAUCE: x86/bugs: Honour SPEC_CTRL default")
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Juerg Haefliger <juergh@canonical.com>

arch/x86/include/asm/mwait.h

@@ -5,7 +5,6 @@
 
 #include <asm/cpufeature.h>
 #include <asm/spec_ctrl.h>
-#include <asm/spec-ctrl.h>
 #include <asm/microcode.h>
 
 #define MWAIT_SUBSTATE_MASK		0xf