drm/msm/hdmi: drop hpd_regs usage on 8x74/8084

The MSM HDMI driver has support for hpd_regs on 8x74/8084: supply
regulators that are to be enabled for HPD to work. Currently these
regulators contain the hpd_gdsc, which was replaced by the power-domains
support and hpd-5v/hpd-5v-en, which are not used by the chip itself.
They power up the ESD bridge.
However it is a separate device which should be represented separately
in the device tree.
None of upstreamed devices support these properties. Thus drop support
for them from the HDMI driver.
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/488860/
Link: https://lore.kernel.org/r/20220609122350.3157529-10-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/hdmi/hdmi.c

@@ -381,24 +381,19 @@ static struct hdmi_platform_config hdmi_tx_8960_config = {
 };
 
 static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"};
-static const char *hpd_reg_names_8x74[] = {"hpd-gdsc", "hpd-5v"};
 static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"};
 static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"};
 static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0};
 
 static struct hdmi_platform_config hdmi_tx_8974_config = {
 		HDMI_CFG(pwr_reg, 8x74),
-		HDMI_CFG(hpd_reg, 8x74),
 		HDMI_CFG(pwr_clk, 8x74),
 		HDMI_CFG(hpd_clk, 8x74),
 		.hpd_freq      = hpd_clk_freq_8x74,
 };
 
-static const char *hpd_reg_names_8084[] = {"hpd-gdsc", "hpd-5v", "hpd-5v-en"};
-
 static struct hdmi_platform_config hdmi_tx_8084_config = {
 		HDMI_CFG(pwr_reg, 8x74),
-		HDMI_CFG(hpd_reg, 8084),
 		HDMI_CFG(pwr_clk, 8x74),
 		HDMI_CFG(hpd_clk, 8x74),
 		.hpd_freq      = hpd_clk_freq_8x74,