tee: optee: making OPTEE_SHM_NUM_PRIV_PAGES configurable via Kconfig

This change adds KCONFIG option to set number of pages out of
whole shared memory to be used for OP-TEE driver private data
structures.

Signed-off-by: Sahil Malhotra <[email protected]>
[jw: fixing trivial merge conflict]
Signed-off-by: Jens Wiklander <[email protected]>

Author: sahilnxp

drivers/tee/optee/Kconfig

@@ -6,6 +6,14 @@ config OPTEE
 	  This implements the OP-TEE Trusted Execution Environment (TEE)
 	  driver.
 
+config OPTEE_SHM_NUM_PRIV_PAGES
+	int "Private Shared Memory Pages"
+	default 1
+	depends on OPTEE
+	help
+	  This sets the number of private shared memory pages to be
+	  used by OP-TEE TEE driver.
+
 config OPTEE_BENCHMARK
 	bool "OP-TEE Benchmark (EXPERIMENTAL)"
 	depends on OPTEE

drivers/tee/optee/core.c

@@ -33,7 +33,7 @@
 
 #define DRIVER_NAME "optee"
 
-#define OPTEE_SHM_NUM_PRIV_PAGES	1
+#define OPTEE_SHM_NUM_PRIV_PAGES	CONFIG_OPTEE_SHM_NUM_PRIV_PAGES
 
 /**
  * optee_from_msg_param() - convert from OPTEE_MSG parameters to