drm/sti: move to devm_platform_ioremap_resource() usage

drm/sti: move to devm_platform_ioremap_resource() usage

Replace platform_get_resource/_byname + devm_ioremap
with just devm_platform_ioremap_resource()

Used Coccinelle to do this change. SmPl patch:

@rule@
identifier res;
expression ioremap;
identifier pdev;
constant mem;
expression name;
@@
-struct resource *res;
...
-res = platform_get_resource_byname(pdev,mem,name);
<...
-if (!res) {
-...
-}
...>
-ioremap = devm_ioremap(...);
+ioremap = devm_platform_ioremap_resource_byname(pdev,name);

and
@rule_2@
identifier res;
expression ioremap;
identifier pdev;
@@
-struct resource *res;
...
-res = platform_get_resource(pdev,...);
<...
-if (!res) {
-...
-}
...>
-ioremap = devm_ioremap(...);
+ioremap = devm_platform_ioremap_resource(pdev,0);

v2: Fix compilation error.
v3: Handle returns properly since the new API return error pointers
and not NULL

Cc: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
Cc: Alain Volmat <alain.volmat@foss.st.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>(v2)
Acked-by: Raphael Gallais-Pou <rgallaispou@gmail.com>(v2)
Signed-off-by: Anusha Srivatsa <asrivats@redhat.com>
Link: https://patchwork.freedesktop.org/patch/640854/?series=144073&rev=5