hw/sd/sdcard: Fill SPI response bits in card code

hw/sd/sdcard: Fill SPI response bits in card code

ssi-sd.c contains the SPI link layer adaptation,
while sd.c contains all the SD card internal details.

We already handle the response values in sd.c, but
missed the SPI case. Complete them (fill R1, prepend
R1 in R3/R7 and always return something in SPI mode).
Remove all the duplication in ssi-sd.c.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250804133406.17456-5-philmd@linaro.org>