sdmmc: Refactor again

- Refactor various variables and defines
- Removed Card/BGA and OEM ID info as they are static and useless
- Commented out bkops functions completely as not used
- Remove extra buf usage when there's already storage for storing that data
- Optimize various functions to save space
- Clean up useless or duplicate code

bdk/storage/sdmmc_driver.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2018 naehrwert
- * Copyright (c) 2018-2020 CTCaer
+ * Copyright (c) 2018-2021 CTCaer
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -934,12 +934,20 @@ static int _sdmmc_config_dma(sdmmc_t *sdmmc, u32 *blkcnt_out, sdmmc_req_t *req)
 		*blkcnt_out = blkcnt;
 
 	u32 trnmode = SDHCI_TRNS_DMA;
+
+	// Set mulitblock request.
 	if (req->is_multi_block)
 		trnmode = SDHCI_TRNS_MULTI | SDHCI_TRNS_BLK_CNT_EN | SDHCI_TRNS_DMA;
+
+	// Set request direction.
 	if (!req->is_write)
 		trnmode |= SDHCI_TRNS_READ;
-	if (req->is_auto_cmd12)
-		trnmode = (trnmode & ~(SDHCI_TRNS_AUTO_CMD12 | SDHCI_TRNS_AUTO_CMD23)) | SDHCI_TRNS_AUTO_CMD12;
+
+	// Automatic send of stop transmission or set block count cmd.
+	if (req->is_auto_stop_trn)
+		trnmode |= SDHCI_TRNS_AUTO_CMD12;
+	//else if (req->is_auto_set_blkcnt)
+	//	trnmode |= SDHCI_TRNS_AUTO_CMD23;
 
 	sdmmc->regs->trnmod = trnmode;
 
@@ -1070,7 +1078,7 @@ DPRINTF("rsp(%d): %08X, %08X, %08X, %08X\n", result,
 			if (blkcnt_out)
 				*blkcnt_out = blkcnt;
 
-			if (req->is_auto_cmd12)
+			if (req->is_auto_stop_trn)
 				sdmmc->rsp3 = sdmmc->regs->rspreg3;
 		}