misc: amd-sbi: Clarify that this is a BMC driver

Add a sentence to the driver description to clarify that the sbrmi-i2c
driver is intended to run on the BMC and not on the managed node. Add
platform dependencies accordingly.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Link: https://lore.kernel.org/r/5c9f7100-0e59-4237-a252-43c3ee4802a2@amd.com
Link: https://patch.msgid.link/20251016155040.0e86c102@endymion
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: jdelvare

drivers/misc/amd-sbi/Kconfig

@@ -2,9 +2,11 @@
 config AMD_SBRMI_I2C
 	tristate "AMD side band RMI support"
 	depends on I2C
+	depends on ARM || ARM64 || COMPILE_TEST
 	select REGMAP_I2C
 	help
 	  Side band RMI over I2C support for AMD out of band management.
+	  This driver is intended to run on the BMC, not the managed node.
 
 	  This driver can also be built as a module. If so, the module will
 	  be called sbrmi-i2c.