bitbake: cooker: Ensure mcdeps are processed even if only one multiconfig

If you have no BBMULTICONFIG set but set mcdepends, they're currently
ignored. We can handle them correctly with this small tweak.

(Bitbake rev: 578f0c02f6a13f4315e7c2ce8b5e876dd2025055)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cooker.py

@@ -638,9 +638,13 @@ class BBCooker:
             runlist.append([mc, k, ktask, fn])
             bb.event.fire(bb.event.TreeDataPreparationProgress(current, len(fulltargetlist)), self.data)
 
+        havemc = False
+        for mc in self.multiconfigs:
+            if taskdata[mc].get_mcdepends():
+                havemc = True
 
         # No need to do check providers if there are no mcdeps or not an mc build
-        if len(self.multiconfigs) > 1:
+        if havemc or len(self.multiconfigs) > 1:
             seen = set()
             new = True
             # Make sure we can provide the multiconfig dependency