target/avr: Remove OFFSET_CPU_REGISTERS

This define isn't really used.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/avr/cpu.h

@@ -60,8 +60,6 @@
 #define OFFSET_CODE 0x00000000
 /* CPU registers, IO registers, and SRAM */
 #define OFFSET_DATA 0x00800000
-/* CPU registers specifically, these are mapped at the start of data */
-#define OFFSET_CPU_REGISTERS OFFSET_DATA
 /*
  * IO registers, including status register, stack pointer, and memory
  * mapped peripherals, mapped just after CPU registers

target/avr/helper.c

@@ -340,8 +340,7 @@ void helper_fullwr(CPUAVRState *env, uint32_t data, uint32_t addr)
     env->fullacc = false;
 
     /* Following logic assumes this: */
-    assert(OFFSET_CPU_REGISTERS == OFFSET_DATA);
-    assert(OFFSET_IO_REGISTERS == OFFSET_CPU_REGISTERS +
+    assert(OFFSET_IO_REGISTERS == OFFSET_DATA +
                                   NUMBER_OF_CPU_REGISTERS);
 
     if (addr < NUMBER_OF_CPU_REGISTERS) {