mmc: host: Drop commas after SoC match table sentinels

It does not make sense to have a comma after a sentinel, as any new
elements must be added before the sentinel.

Add comments to clarify the purpose of the empty elements.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Wolfram Sang <[e-mail]>
Link: https://lore.kernel.org/r/9050f[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/renesas_sdhi_internal_dmac.c

···
 	{ .soc_id = "r8a7795", .revision = "ES2.0", .data = &sdhi_quirks_4tap },
 	{ .soc_id = "r8a7796", .revision = "ES1.[012]", .data = &sdhi_quirks_4tap_nohs400 },
 	{ .soc_id = "r8a7796", .revision = "ES1.*", .data = &sdhi_quirks_r8a7796_es13 },
-	{ /* Sentinel. */ },
+	{ /* Sentinel. */ }
 };
 
 static const struct renesas_sdhi_of_data_with_quirks of_r8a7795_compatible = {

drivers/mmc/host/sdhci-of-esdhc.c

···
 	{ .family = "QorIQ T1040", },
 	{ .family = "QorIQ T2080", },
 	{ .family = "QorIQ LS1021A", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static struct soc_device_attribute soc_tuning_erratum_type2[] = {
···
 	{ .family = "QorIQ LS1080A", },
 	{ .family = "QorIQ LS2080A", },
 	{ .family = "QorIQ LA1575A", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static void esdhc_tuning_block_enable(struct sdhci_host *host, bool enable)
···
 static struct soc_device_attribute soc_incorrect_hostver[] = {
 	{ .family = "QorIQ T4240", .revision = "1.0", },
 	{ .family = "QorIQ T4240", .revision = "2.0", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static struct soc_device_attribute soc_fixup_sdhc_clkdivs[] = {
 	{ .family = "QorIQ LX2160A", .revision = "1.0", },
 	{ .family = "QorIQ LX2160A", .revision = "2.0", },
 	{ .family = "QorIQ LS1028A", .revision = "1.0", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static struct soc_device_attribute soc_unreliable_pulse_detection[] = {
 	{ .family = "QorIQ LX2160A", .revision = "1.0", },
 	{ .family = "QorIQ LX2160A", .revision = "2.0", },
 	{ .family = "QorIQ LS1028A", .revision = "1.0", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)