Support chassis bootdev clear-cmos

Implement the set/get the CMOS clear data 2 of the boot option
parameters boot flags(0x05).

Tested:
1. Set the clear-cmos to yes
   # ipmitool chassis bootdev none clear-cmos=yes
2. Get the bootparam 0x05
   # ipmitool chassis bootparam get 5
   Boot parameter version: 1
   Boot parameter 5 is valid/unlocked
   Boot parameter data: a080000000
    Boot Flags :
      - Boot Flag Valid
      - Options apply to only next boot
      - BIOS EFI boot
      - CMOS Clear
      - Boot Device Selector : No override
      - BIOS verbosity : System Default
      - Console Redirection control : Console redirection occurs per
        BIOS configuration setting (default)
      - BIOS Mux Control Override : BIOS uses recommended setting of
        the mux at the end of POST

Signed-off-by: Hieu Huynh <hieuh@os.amperecomputing.com>
Change-Id: I7312106977f8aef5d781dd276eecf9af279a7dc3
diff --git a/chassishandler.cpp b/chassishandler.cpp
index 30ffb23..60d4ee3 100644
--- a/chassishandler.cpp
+++ b/chassishandler.cpp
@@ -1907,6 +1907,7 @@
 static uint8_t transferStatus = setComplete;
 static uint8_t bootFlagValidBitClr = 0;
 static uint5_t bootInitiatorAckData = 0x0;
+static bool cmosClear = false;
 
 /** @brief implements the Get Chassis system boot option
  *  @param ctx - context pointer
@@ -2036,7 +2037,8 @@
             response.pack(bootOptionParameter, reserved1, uint5_t{},
                           uint1_t{biosBootType}, uint1_t{permanent},
                           uint1_t{validFlag}, uint2_t{}, uint4_t{bootOption},
-                          uint2_t{}, uint8_t{}, uint8_t{}, uint8_t{});
+                          uint1_t{}, cmosClear, uint8_t{}, uint8_t{},
+                          uint8_t{});
             return ipmi::responseSuccess(std::move(response));
         }
         catch (const InternalFailure& e)
@@ -2134,7 +2136,6 @@
         bool screenBlank;
         uint4_t bootDeviceSelector;
         bool lockKeyboard;
-        bool cmosClear;
         uint8_t data3;
         uint4_t biosInfo;
         uint4_t rsvd1;