[PATCH] drivers: optee: fix i2c build issue

[Jorge Ramirez-Ortiz <jorge@foundries.io>]

When the optee driver is compiled into the kernel while the i2c core
is configured as a module, the i2c symbols are not available.

This commit addresses the situation by disabling the i2c support for
this use case while allowing it in all other scenarios:

 i2c=y, optee=y
 i2c=m, optee=m
 i2c=y, optee=m
 i2c=m, optee=y (not supported)

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
---

  This patch applies on top of
  https://git.linaro.org/people/jens.wiklander/linux-tee.git/tag/?h=optee-i2c-for-v5.10

 drivers/tee/optee/rpc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/tee/optee/rpc.c b/drivers/tee/optee/rpc.c
index 64a206c56264..96e91d5f0a86 100644
--- a/drivers/tee/optee/rpc.c
+++ b/drivers/tee/optee/rpc.c
@@ -51,6 +51,7 @@ static void handle_rpc_func_cmd_get_time(struct optee_msg_arg *arg)
 }
 
 #if IS_ENABLED(CONFIG_I2C)
+#if !defined(CONFIG_I2C_MODULE) || defined(CONFIG_OPTEE_MODULE)
 static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
 					     struct optee_msg_arg *arg)
 {
@@ -140,6 +141,7 @@ static void handle_rpc_func_cmd_i2c_transfer(struct tee_context *ctx,
 	arg->ret = TEEC_ERROR_NOT_SUPPORTED;
 }
 #endif
+#endif
 
 static struct wq_entry *wq_entry_get(struct optee_wait_queue *wq, u32 key)
 {
-- 
2.17.1