use max-inline-insns-auto=110 only on SAMD21

Author: dhalbert

ports/atmel-samd/Makefile

@@ -104,21 +104,18 @@ else
   CFLAGS += -DNDEBUG
 
   # Do a default shrink for small builds, including all SAMD21 builds.
+  # -finline-limit can shrink the image size.
+  # -finline-limit=80 or so is similar to not having it on.
+  # There is no simple default value, though.
   ifeq ($(CIRCUITPY_FULL_BUILD),0)
-    SHRINK_BUILD = 1
+    CFLAGS += -finline-limit=45
   else
     ifeq ($(CHIP_FAMILY), samd21)
-      SHRINK_BUILD = 1
+      # max-inline-insns-auto increases the size of SAMD51 builds.
+      CFLAGS += -finline-limit=45 --param max-inline-insns-auto=110
     endif
   endif
 
-  # -finline-limit can shrink the image size.
-  # -finline-limit=80 or so is similar to not having it on.
-  # There is no simple default value, though.
-  ifeq ($(SHRINK_BUILD), 1)
-    CFLAGS += -finline-limit=45 --param max-inline-insns-auto=110
-  endif
-
   # We used to do this but it seems to not reduce space any more, at least in gcc 11.
   # Leave it here, commented out, just for reference.
   # --param inline-unit-growth=15