CPU: Use partial icache fills for non-line-aligned addresses

src/core/cpu_core.h

@@ -25,13 +25,8 @@ enum : PhysicalMemoryAddress
   ICACHE_LINE_SIZE = 16,
   ICACHE_LINES = ICACHE_SIZE / ICACHE_LINE_SIZE,
   ICACHE_SLOTS_PER_LINE = ICACHE_SLOTS / ICACHE_LINES,
-  ICACHE_TAG_ADDRESS_MASK = 0xFFFFFFF0u
-};
-
-enum : u32
-{
-  ICACHE_DISABLED_BIT = 0x01,
-  ICACHE_INVALD_BIT = 0x02,
+  ICACHE_TAG_ADDRESS_MASK = 0xFFFFFFF0u,
+  ICACHE_INVALID_BITS = 0x0Fu,
 };
 
 union CacheControl