LoongArch: KVM: Remove unnecessary header include path

arch/loongarch/kvm/ includes local headers with the double-quote form
(#include "..."). Also, TRACE_INCLUDE_PATH in arch/loongarch/kvm/trace.h
is relative to include/trace/.

Hence, the local header search path is unneeded.

Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>