Consolidate MAX/MIN definitions

There were several, now there is one (two if you count the lower-case
versions).

Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/include/common.h b/include/common.h
index b8a654a..df64bf0 100644
--- a/include/common.h
+++ b/include/common.h
@@ -177,6 +177,9 @@
 	({ typeof (X) __x = (X), __y = (Y);	\
 		(__x > __y) ? __x : __y; })
 
+#define MIN(x, y)  min(x, y)
+#define MAX(x, y)  max(x, y)
+
 
 /**
  * container_of - cast a member of a structure out to the containing structure
diff --git a/include/usbdcore.h b/include/usbdcore.h
index cb2be72..206dbbc 100644
--- a/include/usbdcore.h
+++ b/include/usbdcore.h
@@ -126,14 +126,6 @@
 				})
 #endif
 
-#ifndef MIN
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-#endif
-#ifndef MAX
-#define MAX(a,b) ((a) > (b) ? (a) : (b))
-#endif
-
-
 /*
  * Structure member address manipulation macros.
  * These are used by client code (code using the urb_link routines), since