Update KSDK SDHC driver for K64F & K66F

[mmahadevan108]

Description

1. Use function pointer for interrupt handler, this should reduce the code-size
   for applications that do not use this driver
2. Fix the wait for initialization of the SD card
3. Fix SDHC driver support for non-word aligned accesses
4. Remove some redundant code & assert function calls.
5. Updated various comments

Status

**READY

Todos

• Tests
  • Code size prior to commit:

Elf2Bin: dev_null
+-----------+-------+-------+-------+
| Module    | .text | .data |  .bss |
+-----------+-------+-------+-------+
| Misc      | 37371 |   292 | 10036 |
| Subtotals | 37371 |   292 | 10036 |
+-----------+-------+-------+-------+
Allocated Heap: unknown
Allocated Stack: unknown
Total Static RAM memory (data + bss): 10328 bytes
Total RAM memory (data + bss + heap + stack): 10328 bytes
Total Flash memory (text + data + misc): 37663 bytes

• Code size after commit:

Elf2Bin: dev_null
+-----------+-------+-------+-------+
| Module    | .text | .data |  .bss |
+-----------+-------+-------+-------+
| Misc      | 35447 |   296 | 10036 |
| Subtotals | 35447 |   296 | 10036 |
+-----------+-------+-------+-------+
Allocated Heap: unknown
Allocated Stack: unknown
Total Static RAM memory (data + bss): 10332
Total RAM memory (data + bss + heap + stack
Total Flash memory (text + data + misc): 35

[mmahadevan108]

@maclobdell @sg-

[sg-]

/morph test

[sg-]

@mbed-bot: TEST

HOST_OSES=ALL
BUILD_TOOLCHAINS=ALL
TARGETS=ALL

[mbed-bot]

Result: SUCCESS

Your command has finished executing! Here's what you wrote!

/morph test

Output

mbed Build Number: 912

All builds and test passed!

[mbed-bot]

[Build 956]
SUCCESS: Building succeeded and tests were run! Be sure to check the test results