hw/i2c/smbus_ich9.c calls range_covers_byte(). Include "qemu/range.h"
which declares it.

This fixes (when modifying unrelated headers):

  hw/i2c/smbus_ich9.c:66:9: error: implicit declaration of function 'range_covers_byte' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
      if (range_covers_byte(address, len, ICH9_SMB_HOSTC)) {
          ^

Acked-by: John Snow <jsnow@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200228114649.12818-14-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>