mmc: rtsx: Fix build errors/warnings for unused variable

The struct device *dev, is no longer needed at various functions, let's
therefore drop it to fix the build errors/warnings.

Fixes: 7570fb41 ("mmc: rtsx: Let MMC core handle runtime PM")
Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20220301115300.64332-1-ulf.hansson@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/mmc/host/rtsx_pci_sdmmc.c

@@ -806,7 +806,6 @@ static void sd_request(struct work_struct *work)
 	struct mmc_request *mrq = host->mrq;
 	struct mmc_command *cmd = mrq->cmd;
 	struct mmc_data *data = mrq->data;
-	struct device *dev = &host->pdev->dev;
 
 	unsigned int data_size = 0;
 	int err;
@@ -1081,7 +1080,6 @@ static void sdmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
 	struct rtsx_pcr *pcr = host->pcr;
-	struct device *dev = &host->pdev->dev;
 
 	if (host->eject)
 		return;
@@ -1130,7 +1128,6 @@ static int sdmmc_get_ro(struct mmc_host *mmc)
 {
 	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
 	struct rtsx_pcr *pcr = host->pcr;
-	struct device *dev = &host->pdev->dev;
 	int ro = 0;
 	u32 val;
 
@@ -1156,7 +1153,6 @@ static int sdmmc_get_cd(struct mmc_host *mmc)
 {
 	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
 	struct rtsx_pcr *pcr = host->pcr;
-	struct device *dev = &host->pdev->dev;
 	int cd = 0;
 	u32 val;
 
@@ -1255,7 +1251,6 @@ static int sdmmc_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
 	struct rtsx_pcr *pcr = host->pcr;
-	struct device *dev = &host->pdev->dev;
 	int err = 0;
 	u8 voltage;
 
@@ -1308,7 +1303,6 @@ static int sdmmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
 {
 	struct realtek_pci_sdmmc *host = mmc_priv(mmc);
 	struct rtsx_pcr *pcr = host->pcr;
-	struct device *dev = &host->pdev->dev;
 	int err = 0;
 
 	if (host->eject)