Change a physical address to any.

This addresses issue #1325 and updates "A cache block is identified a physical address..." to "any physical address".

Author: wmat

src/cmo.adoc

@@ -89,7 +89,7 @@ a cache that first performs a read transfer from memory._
 
 Caches organize copies of data into _cache blocks_, each of which represents a
 contiguous, naturally aligned power-of-two (or _NAPOT_) range of memory
-locations. A cache block is identified by a physical address corresponding to
+locations. A cache block is identified by any of the physical addresses corresponding to
 the underlying memory locations. The capacity and organization of a cache and
 the size of a cache block are both _implementation-specific_, and the execution
 environment provides software a means to discover information about the caches