staging: greybus: sdio: remove KERNEL_VERSION checks

No need to support older kernel versions in the Greybus SDIO driver, so
remove the checks as needed, we can now rely on all of the correct SDIO
core apis being present.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/kernel_ver.h

@@ -22,19 +22,6 @@
 #define CORE_OWNS_PSY_STRUCT
 #endif
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0)
-#define MMC_HS400_SUPPORTED
-#define MMC_DDR52_DEFINED
-#endif
-
-#ifndef MMC_CAP2_CORE_RUNTIME_PM
-#define MMC_CAP2_CORE_RUNTIME_PM	0
-#endif
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 17, 0)
-#define MMC_POWER_UNDEFINED_SUPPORTED
-#endif
-
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
 /*
  * Power supply get by name need to drop reference after call

drivers/staging/greybus/sdio.c

@@ -46,6 +46,10 @@ struct gb_sdio_host {
 /* kernel vdd starts at 0x80 and we need to translate to greybus ones 0x01 */
 #define GB_SDIO_VDD_SHIFT	8
 
+#ifndef MMC_CAP2_CORE_RUNTIME_PM
+#define MMC_CAP2_CORE_RUNTIME_PM	0
+#endif
+
 static inline bool single_op(struct mmc_command *cmd)
 {
 	uint32_t opcode = cmd->opcode;
@@ -78,10 +82,8 @@ static void _gb_sdio_set_host_caps(struct gb_sdio_host *host, u32 r)
 		((r & GB_SDIO_CAP_DRIVER_TYPE_D) ? MMC_CAP_DRIVER_TYPE_D : 0);
 
 	caps2 = ((r & GB_SDIO_CAP_HS200_1_2V) ? MMC_CAP2_HS200_1_2V_SDR : 0) |
-#ifdef MMC_HS400_SUPPORTED
 		((r & GB_SDIO_CAP_HS400_1_2V) ? MMC_CAP2_HS400_1_2V : 0) |
 		((r & GB_SDIO_CAP_HS400_1_8V) ? MMC_CAP2_HS400_1_8V : 0) |
-#endif
 		((r & GB_SDIO_CAP_HS200_1_8V) ? MMC_CAP2_HS200_1_8V_SDR : 0);
 
 	host->mmc->caps = caps;
@@ -617,11 +619,9 @@ static void gb_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	case MMC_POWER_ON:
 		power_mode = GB_SDIO_POWER_ON;
 		break;
-#ifdef MMC_POWER_UNDEFINED_SUPPORTED
 	case MMC_POWER_UNDEFINED:
 		power_mode = GB_SDIO_POWER_UNDEFINED;
 		break;
-#endif
 	}
 	request.power_mode = power_mode;
 
@@ -665,19 +665,15 @@ static void gb_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	case MMC_TIMING_UHS_DDR50:
 		timing = GB_SDIO_TIMING_UHS_DDR50;
 		break;
-#ifdef MMC_DDR52_DEFINED
 	case MMC_TIMING_MMC_DDR52:
 		timing = GB_SDIO_TIMING_MMC_DDR52;
 		break;
-#endif
 	case MMC_TIMING_MMC_HS200:
 		timing = GB_SDIO_TIMING_MMC_HS200;
 		break;
-#ifdef MMC_HS400_SUPPORTED
 	case MMC_TIMING_MMC_HS400:
 		timing = GB_SDIO_TIMING_MMC_HS400;
 		break;
-#endif
 	}
 	request.timing = timing;