hexagon: correct typos

Correct typos automatically found with the `typos` tool
<https://crates.io/crates/typos>

Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

target/hexagon/idef-parser/macros.inc

@@ -127,5 +127,5 @@
 /* Include fHIDE macros which hide type declarations */
 #define fHIDE(A) A
 
-/* Purge non-relavant parts */
+/* Purge non-relevant parts */
 #define fBRANCH_SPECULATE_STALL(A, B, C, D, E)