Minor documentation improvements.

LUFA/Common/ArchitectureSpecific.h

@@ -143,7 +143,7 @@
 
 				#if !defined(pgm_read_ptr) || defined(__DOXYGEN__)
 					/** Reads a pointer out of PROGMEM space on the AVR8 architecture. This is currently a wrapper for the
-					 *  avr-libc \c pgm_read_ptr() macro with a \c void* cast, so that its value can be assigned directly
+					 *  avr-libc \c pgm_read_word() macro with a \c void* cast, so that its value can be assigned directly
 					 *  to a pointer variable or used in pointer arithmetic without further casting in C. In a future
 					 *  avr-libc distribution this will be part of the standard API and will be implemented in a more formal
 					 *  manner.

LUFA/Common/Architectures.h

@@ -67,7 +67,7 @@
 			/** Selects the Atmel 32-bit UC3 AVR (AT32UC3* chips) architecture. */
 			#define ARCH_UC3            1
 
-			/** Selects the Atmel XMEGA AVR (ATXMEGA*U chips) architecture. */
+			/** Selects the Atmel XMEGA AVR (ATXMEGA* chips) architecture. */
 			#define ARCH_XMEGA          2
 
 			#if !defined(__DOXYGEN__)