hw/arm: Remove spurious WM8750 dependency from Realview Kconfig

The REALVIEW Kconfig stanza has a "select WM8750"; however the board itself doesn't actually use this i2c audio device: its audio is provided by the pl041 (which connects to an LM4549). Remove the spurious dependency. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Jan Kiszka <jan.kiszka@web.de> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com> Message-id: 20260819185430.3467629-3-peter.maydell@linaro.org