remoteproc: qcom: fix initializers for qcom_mss_reg_res array

The recently added initialization is rather unusual because it uses a constructor for
a variable-length array to assign a constant structure to a member that uses a fixed-length
array. This confuses clang and breaks the build.

drivers/remoteproc/qcom_q6v5_pil.c:1024:18: error: incompatible pointer types initializing 'const char *' with an expression of type
:%s      'struct qcom_mss_reg_res [4]' [-Werror,-Wincompatible-pointer-types]
        .proxy_supply = (struct qcom_mss_reg_res[]) {
                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/remoteproc/qcom_q6v5_pil.c:1024:18: warning: suggest braces around initialization of subobject [-Wmissing-braces]
        .proxy_supply = (struct qcom_mss_reg_res[]) {
                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We can either turn this constructor into a regular initializer by removing
the 'struct qcom_mss_reg_res[])', or we can make the array variable length.

The latter approach is used for the arrays of strings in the same structure,
so let's use that here too.

Fixes: 19f902b53b ("remoteproc: qcom: Initialize and enable proxy and active regulators.")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

drivers/remoteproc/qcom_q6v5_pil.c

@@ -107,8 +107,8 @@ struct qcom_mss_reg_res {
 
 struct rproc_hexagon_res {
 	const char *hexagon_mba_image;
-	struct qcom_mss_reg_res proxy_supply[4];
-	struct qcom_mss_reg_res active_supply[2];
+	struct qcom_mss_reg_res *proxy_supply;
+	struct qcom_mss_reg_res *active_supply;
 	char **proxy_clk_names;
 	char **active_clk_names;
 };