plat: qti: Fix build failure

Fixed build failure due to the commit:905f93c77 by removing
the inclusion of non-existent 'stdinit.h' file.

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I8e3ca69c016b7a2354c58c4d384a492631c36286
diff --git a/plat/qti/common/inc/qti_rng.h b/plat/qti/common/inc/qti_rng.h
index c933dea..62c31f3 100644
--- a/plat/qti/common/inc/qti_rng.h
+++ b/plat/qti/common/inc/qti_rng.h
@@ -7,7 +7,7 @@
 #ifndef QTI_RNG_H
 #define QTI_RNG_H
 
-#include <stdinit.h>
+#include <stdint.h>
 
 int qti_rng_get_data(uint8_t *out, uint32_t out_len);