linux-oniro: Fix COMPATIBLE_MACHINE regex match

With the current regex expression a machine that is not part of the
compatible one would match if it is a substring of one of the machines
part of the regex expression.

For example "qemuarm64-efi" will match
"qemuarm|qemuarm64|qemux86|qemux86-64|qemuriscv64|qemuriscv32|qemu-generic-arm64".

Fix this by matching the start and the end of the string.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-oniro-core/recipes-kernel/linux/linux-oniro_5.10.bb

@@ -32,7 +32,7 @@ PROVIDES="linux-oniro virtual/kernel"
 
 KCONF_BSP_AUDIT_LEVEL = "1"
 
-COMPATIBLE_MACHINE = "qemuarm|qemuarm64|qemux86|qemux86-64|qemuriscv64|qemuriscv32|qemu-generic-arm64"
+COMPATIBLE_MACHINE = "^(qemuarm|qemuarm64|qemux86|qemux86-64|qemuriscv64|qemuriscv32|qemu-generic-arm64)$"
 
 # Functionality flags
 KERNEL_EXTRA_FEATURES ?= "features/netfilter/netfilter.scc"