kirkwood: solidify SATA_PMP config

SATA_PMP option is no longer exposed when no SATA host driver is enabled
since upstream linux commit bd322af15ce9 ("ata: make SATA_PMP option
selectable only if any SATA host driver is enabled").

Commit 1bb3f593ee ("kirkwood: update config for kernel 5.10") manually
added CONFIG_SATA_PMP=y to config file, but the config will disappear for
every kernel_oldconfig refresh.

To prevent this, a small hack is added, which selects SATA_HOST
automatically when SATA_PMP is enabled. This patch can be dropped if
SATA_MV is ever re-added into kernel config file.

Tested-by: Pawel Dembicki <paweldembicki@gmail.com>
Signed-off-by: Sungbo Eo <mans0n@gorani.run>
[Move patch to generic/hack-5.10]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/generic/hack-5.10/252-SATA_PMP.patch

@@ -0,0 +1,23 @@
+From 8c817e33be829c7249c2cfd59ff48ad5fac6a31d Mon Sep 17 00:00:00 2001
+From: Sungbo Eo <mans0n@gorani.run>
+Date: Fri, 7 Jul 2017 17:09:21 +0200
+Subject: [PATCH] kconfig: solidify SATA_PMP config
+
+SATA_PMP option in kernel config file disappears for every kernel_oldconfig refresh.
+To prevent this, SATA_HOST is now selected automatically when SATA_PMP is enabled.
+This patch can be dropped if SATA_MV is ever re-added into the config.
+---
+ drivers/ata/Kconfig | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/ata/Kconfig
++++ b/drivers/ata/Kconfig
+@@ -112,7 +112,7 @@ config SATA_ZPODD
+ 
+ config SATA_PMP
+ 	bool "SATA Port Multiplier support"
+-	depends on SATA_HOST
++	select SATA_HOST
+ 	default y
+ 	help
+ 	  This option adds support for SATA Port Multipliers

target/linux/kirkwood/config-5.10

@@ -234,6 +234,7 @@ CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_MV=y
 CONFIG_RTC_I2C_AND_SPI=y
 CONFIG_RTC_MC146818_LIB=y
+CONFIG_SATA_HOST=y
 CONFIG_SATA_PMP=y
 CONFIG_SCSI=y
 CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y