arch-arm: Add missing include in QARMA implementation

Change-Id: Ic8a0146968d45ab1007687686eb73639a1c85513
Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27407
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: Gem5 Cloud Project GCB service account <345032938727@cloudbuild.gserviceaccount.com>

src/arch/arm/qarma.cc

@@ -37,6 +37,8 @@
 
 #include "arch/arm/qarma.hh"
 
+#include <array>
+
 #include "base/bitfield.hh"
 
 using namespace QARMA;