target/arm: Introduce store_cpu_field_constant() helper

target/arm: Introduce store_cpu_field_constant() helper

Similarly to the store_cpu_field() helper which takes a TCG
temporary, store its value to the CPUState, introduce the
store_cpu_field_constant() helper which store a constant to
CPUState (without using any TCG temporary).

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20211029231834.2476117-3-f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>