mmc: sdhci-pci-gli: Fine tune GL9763E L1 entry delay

Fine tune the value to 21us in order to improve read/write performance.
Signed-off-by: NBen Chuang <benchuanggli@gmail.com>
Link: https://lore.kernel.org/r/20210511061835.5559-1-benchuanggli@gmail.comSigned-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-pci-gli.c

@@ -94,7 +94,7 @@
 
 #define PCIE_GLI_9763E_CFG2      0x8A4
 #define   GLI_9763E_CFG2_L1DLY     GENMASK(28, 19)
-#define   GLI_9763E_CFG2_L1DLY_MID 0x50
+#define   GLI_9763E_CFG2_L1DLY_MID 0x54
 
 #define PCIE_GLI_9763E_MMC_CTRL  0x960
 #define   GLI_9763E_HS400_SLOW     BIT(3)
@@ -847,7 +847,7 @@ static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
 
 	pci_read_config_dword(pdev, PCIE_GLI_9763E_CFG2, &value);
 	value &= ~GLI_9763E_CFG2_L1DLY;
-	/* set ASPM L1 entry delay to 20us */
+	/* set ASPM L1 entry delay to 21us */
 	value |= FIELD_PREP(GLI_9763E_CFG2_L1DLY, GLI_9763E_CFG2_L1DLY_MID);
 	pci_write_config_dword(pdev, PCIE_GLI_9763E_CFG2, value);