misra: deviate MISRA C Rule 5.5 for hypfs_alloc_dyndata()

MISRA C Rule 5.5 states: "Identifiers shall be distinct from macro
names".

Update ECLAIR configuration to deviate identifier and macro name
clashes by specifying the macros that should be ignored.
This includes hypfs_alloc_dyndata(), where the real function takes
an allocation size and the same-named macro is a typed convenience
wrapper that expands calls using sizeof(type).

Update deviations.rst and rules.rst accordingly.

Signed-off-by: Dmytro Prokopchuk <dmytro_prokopchuk1@epam.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

automation/eclair_analysis/ECLAIR/deviations.ecl

@@ -133,6 +133,10 @@ These macros address differences in argument count during compile-time, effectiv
 -config=MC3A2.R5.5,ignored_macros+="name(update_gnttab_par||parse_gnttab_limit)&&loc(file(^xen/common/grant_table\\.c$))"
 -doc_end
 
+-doc_begin="Clash between hypfs_alloc_dyndata() function and macro name in xen/include/xen/hypfs.h is deliberate."
+-config=MC3A2.R5.5,ignored_macros+="name(hypfs_alloc_dyndata)&&loc(file(^xen/include/xen/hypfs\\.h$))"
+-doc_end
+
 -doc_begin="The type \"ret_t\" is deliberately defined multiple times,
 depending on the guest."
 -config=MC3A2.R5.6,reports+={deliberate,"any_area(any_loc(text(^.*ret_t.*$)))"}