D02/RTC: Fix runtime access exception
D02/RTC: Fix runtime access exception

Continue to set memory space attribute for I2C controller even when
adding space failed.

Signed-off-by: Heyi Guo <c5332928fee189fee76555401b7f2e83c5c8a6dc@linaro.org>

joyxu/uefi,joyxu/uefi,joyxu/uefi