Fix: Packed attribute missing for FF_Part_t causing buggy memcpy and alignment issues (#77)

Fix: Packed attribute missing for FF_Part_t causing buggy memcpy and
alignment issues

Description
-----------
The structure `FF_Part_t` was used with `memcpy` to copy partition data
(`pxPartitions + xPartNr` into `p`) in ff_ioman.c, but it contains
bitfields:

typedef struct _SPart
{
    uint32_t ulStartLBA;
    uint32_t ulSectorCount;
    uint32_t ucActive : 8,
             ucPartitionID : 8,
             bIsExtended : 1;
} FF_Part_t;

Test Steps
-----------
This is a general fix; no additional tests are required.

Checklist:
----------
- [ ] I have tested my changes. No regression in existing tests[NOT
TESTED].
- [ ] I have modified and/or added unit-tests to cover the code changes
in this Pull Request.

Related Issue
-----------
None opened

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copy, and redistribute this contribution, under the terms of your
choice.

Author: Adithya65

include/ff_ioman.h

@@ -375,10 +375,10 @@
     {
         uint32_t ulStartLBA;    /* FF_FAT_PTBL_LBA */
         uint32_t ulSectorCount; /* FF_FAT_PTBL_SECT_COUNT */
-        uint32_t
-            ucActive : 8,       /* FF_FAT_PTBL_ACTIVE */
-            ucPartitionID : 8,  /* FF_FAT_PTBL_ID */
-            bIsExtended : 1;
+        uint8_t ucActive;       /* FF_FAT_PTBL_ACTIVE */
+        uint8_t ucPartitionID;  /* FF_FAT_PTBL_ID */
+        uint8_t bIsExtended;
+        uint8_t bIsUnused;      /*Byte added to make the length a multiple of 32 byte.*/
     } FF_Part_t;
 
     typedef struct _SPartFound