MdePkg: Fix UINT64 and INT64 word length for LoongArch64

MdePkg: Fix UINT64 and INT64 word length for LoongArch64

The UINT64 and INT64 should be defined as unsigned long long and long long
in the linux64 bit environment, but now defined as unsigned long and long,
so fix it.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4330

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Chao Li <lichao@loongson.cn>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>