mach-tegra: Adding MMC_KEEP_POWER to support suspend/resume for wifi SDIO slot

drivers/mmc/host/sdhci-tegra.c

 /*
  * Copyright (C) 2010 The Chromium OS Authors <chromium-os-dev@chromium.org>
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
  * may be copied, distributed, and modified under those terms.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@@ skipping 166 matching lines @@
 
         clk = clk_get(mmc_dev(host->mmc), NULL);
         if (IS_ERR(clk)) {
                 dev_err(mmc_dev(host->mmc), "clk err\n");
                 rc = PTR_ERR(clk);
                 goto out_wp;
         }
         clk_enable(clk);
         pltfm_host->clk = clk;
 
+        host->mmc->pm_caps = plat->pm_flags;
+
         if (plat->is_8bit)
                 host->mmc->caps |= MMC_CAP_8_BIT_DATA;
 
         return 0;
 
 out_wp:
         if (gpio_is_valid(plat->wp_gpio)) {
                 tegra_gpio_disable(plat->wp_gpio);
                 gpio_free(plat->wp_gpio);
         }
@@ skipping 51 matching lines @@
 
 struct sdhci_pltfm_data sdhci_tegra_pdata = {
         .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
                   SDHCI_QUIRK_SINGLE_POWER_WRITE |
                   SDHCI_QUIRK_NO_HISPD_BIT |
                   SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC,
         .ops  = &tegra_sdhci_ops,
         .init = tegra_sdhci_pltfm_init,
         .exit = tegra_sdhci_pltfm_exit,
 };