base: add support for loongarch64

(From OE-Core rev: 759baaceb4dd623d5da12ba0d01540fa080154ba)

Signed-off-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/canned-wks/qemuloongarch.wks

@@ -0,0 +1,3 @@
+# short-description: Create qcow2 image for LoongArch QEMU machines
+
+part / --source rootfs --fstype=ext4 --label root --align 4096 --size 5G

scripts/runqemu

@@ -1313,7 +1313,7 @@ class BaseConfig(object):
         """attempt to determine the appropriate qemu-system binary"""
         mach = self.get('MACHINE')
         if not mach:
-            search = '.*(qemux86-64|qemux86|qemuarm64|qemuarm|qemumips64|qemumips64el|qemumipsel|qemumips|qemuppc).*'
+            search = '.*(qemux86-64|qemux86|qemuarm64|qemuarm|qemuloongarch64|qemumips64|qemumips64el|qemumipsel|qemumips|qemuppc).*'
             if self.rootfs:
                 match = re.match(search, self.rootfs)
                 if match:
@@ -1336,6 +1336,8 @@ class BaseConfig(object):
             qbsys = 'x86_64'
         elif mach == 'qemuppc':
             qbsys = 'ppc'
+        elif mach == 'qemuloongarch64':
+            qbsys = 'loongarch64'
         elif mach == 'qemumips':
             qbsys = 'mips'
         elif mach == 'qemumips64':