fastboot: Fix warning when CONFIG_SYS_64BIT_LBA is enable

If CONFIG_SYS_64BIT_LBA is enable, following compilation warning is
triggered:

 CC      drivers/fastboot/fb_mmc.o
../drivers/fastboot/fb_mmc.c: In function 'fb_mmc_erase_mmc_hwpart':
../drivers/fastboot/fb_mmc.c:215:35: warning: format '%lu' expects
argument of type 'long unsigned int', but argument 2 has type
'long long unsigned int' [-Wformat=]
  215 |         printf("........ erased %lu bytes from mmc hwpart[%u]\n",
      |                                 ~~^
      |                                   |
      |                                   long unsigned int
      |                                 %llu
  216 |                dev_desc->lba * dev_desc->blksz, dev_desc->hwpart);
      |                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                              |
      |                              long long unsigned int
../drivers/fastboot/fb_mmc.c: In function 'fb_mmc_boot_ops':
../drivers/fastboot/fb_mmc.c:261:42: warning: format '%lu' expects
argument of type 'long unsigned int', but argument 2 has type
'long long unsigned int' [-Wformat=]
  261 |                 printf("........ wrote %lu bytes to EMMC_BOOT%d\n",
      |                                        ~~^
      |                                          |
      |                                          long unsigned int
      |                                        %llu
  262 |                        blkcnt * blksz, hwpart);
      |                        ~~~~~~~~~~~~~~
      |                               |
      |                               long long unsigned int

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Acked-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/drivers/fastboot/fb_mmc.c b/drivers/fastboot/fb_mmc.c
index f11eb66..dca7c22 100644
--- a/drivers/fastboot/fb_mmc.c
+++ b/drivers/fastboot/fb_mmc.c
@@ -211,8 +211,8 @@
 		return 1;
 	}
 
-	printf("........ erased %lu bytes from mmc hwpart[%u]\n",
-	       dev_desc->lba * dev_desc->blksz, dev_desc->hwpart);
+	printf("........ erased %llu bytes from mmc hwpart[%u]\n",
+	       (u64)(dev_desc->lba * dev_desc->blksz), dev_desc->hwpart);
 
 	return 0;
 }
@@ -257,8 +257,8 @@
 			return;
 		}
 
-		printf("........ wrote %lu bytes to EMMC_BOOT%d\n",
-		       blkcnt * blksz, hwpart);
+		printf("........ wrote %llu bytes to EMMC_BOOT%d\n",
+		       (u64)(blkcnt * blksz), hwpart);
 	} else { /* erase */
 		if (fb_mmc_erase_mmc_hwpart(dev_desc)) {
 			pr_err("Failed to erase EMMC_BOOT%d\n", hwpart);