configs: Add CONFIG_BCACHE=m

Allow block devices to be used as caches for other devices. The primary
use is to allow small, low latency media to act as caches for spinning
rust drives.

See: #6303
     #455

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

Author: pelwell

Diff for: arch/arm/configs/bcm2709_defconfig

@@ -461,6 +461,7 @@ CONFIG_ISCSI_TCP=m
 CONFIG_ISCSI_BOOT_SYSFS=m
 CONFIG_ATA=m
 CONFIG_MD=y
+CONFIG_BCACHE=m
 CONFIG_BLK_DEV_DM=m
 CONFIG_DM_CRYPT=m
 CONFIG_DM_SNAPSHOT=m

Diff for: arch/arm/configs/bcm2711_defconfig

@@ -471,6 +471,7 @@ CONFIG_ATA=m
 CONFIG_SATA_AHCI=m
 CONFIG_SATA_MV=m
 CONFIG_MD=y
+CONFIG_BCACHE=m
 CONFIG_BLK_DEV_DM=m
 CONFIG_DM_CRYPT=m
 CONFIG_DM_SNAPSHOT=m

Diff for: arch/arm/configs/bcmrpi_defconfig

@@ -456,6 +456,7 @@ CONFIG_ISCSI_TCP=m
 CONFIG_ISCSI_BOOT_SYSFS=m
 CONFIG_ATA=m
 CONFIG_MD=y
+CONFIG_BCACHE=m
 CONFIG_BLK_DEV_DM=m
 CONFIG_DM_CRYPT=m
 CONFIG_DM_SNAPSHOT=m

Diff for: arch/arm64/configs/bcm2711_defconfig

@@ -493,6 +493,7 @@ CONFIG_ATA=m
 CONFIG_SATA_AHCI=m
 CONFIG_SATA_MV=m
 CONFIG_MD=y
+CONFIG_BCACHE=m
 CONFIG_BLK_DEV_DM=m
 CONFIG_DM_CRYPT=m
 CONFIG_DM_SNAPSHOT=m

Diff for: arch/arm64/configs/bcm2712_defconfig

@@ -496,6 +496,7 @@ CONFIG_ATA=m
 CONFIG_SATA_AHCI=m
 CONFIG_SATA_MV=m
 CONFIG_MD=y
+CONFIG_BCACHE=m
 CONFIG_BLK_DEV_DM=m
 CONFIG_DM_CRYPT=m
 CONFIG_DM_SNAPSHOT=m

Diff for: arch/arm64/configs/bcmrpi3_defconfig

@@ -467,6 +467,7 @@ CONFIG_ISCSI_TCP=m
 CONFIG_ISCSI_BOOT_SYSFS=m
 CONFIG_ATA=m
 CONFIG_MD=y
+CONFIG_BCACHE=m
 CONFIG_BLK_DEV_DM=m
 CONFIG_DM_CRYPT=m
 CONFIG_DM_SNAPSHOT=m