realtek: fix "help" line in Kconfig in files/patches for 5.10

In Kernel 5.10, "help" must be used instead of "---help---".

this patch fixes the following errors:

drivers/net/dsa/rtl83xx/Kconfig:7: syntax errorgit
drivers/net/dsa/rtl83xx/Kconfig:6: unknown statement "---help---"
drivers/net/dsa/rtl83xx/Kconfig:7:warning: ignoring unsupported character '.'
drivers/net/dsa/rtl83xx/Kconfig:7: unknown statement "This"
drivers/net/ethernet/Kconfig:170: syntax error
drivers/net/ethernet/Kconfig:169: unknown statement "---help---"
drivers/net/ethernet/Kconfig:170:warning: ignoring unsupported character '.'
drivers/net/ethernet/Kconfig:170: unknown statement "Say"
drivers/net/phy/Kconfig:331: syntax error
drivers/net/phy/Kconfig:330: unknown statement "---help---"
drivers/net/phy/Kconfig:331: unknown statement "Supports"

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>

target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/Kconfig

@@ -3,6 +3,6 @@ config NET_DSA_RTL83XX
 	tristate "Realtek RTL838x/RTL839x switch support"
 	depends on RTL838X
 	select NET_DSA_TAG_TRAILER
-	---help---
+	help
 	  This driver adds support for Realtek RTL83xx series switching.
 

target/linux/realtek/patches-5.10/702-net-ethernet-add-support-for-rtl838x-ethernet.patch

@@ -8,7 +8,7 @@
 +config NET_RTL838X
 +	tristate "Realtek rtl838x Ethernet MAC support"
 +	depends on RTL838X
-+	---help---
++	help
 +	  Say Y here if you want to use the Realtek rtl838x Gbps Ethernet MAC.
 +
  source "drivers/net/ethernet/samsung/Kconfig"

target/linux/realtek/patches-5.10/705-add-rtl-phy.patch

@@ -7,7 +7,7 @@
 +config REALTEK_SOC_PHY
 +	tristate "Realtek SoC PHYs"
 +	depends on RTL838X
-+	---help---
++	help
 +	  Supports the PHYs found in combination with Realtek Switch SoCs
 +
  config RENESAS_PHY