tools/btmgmt: Fix errors reported by scan-build

tools/btmgmt: Fix errors reported by scan-build

This patch fixes the errors reported by the scan-build.

tools/btmgmt.c:2699:2: warning: Value stored to 'argc' is never read
[deadcode.DeadStores]
        argc -= optind;
        ^       ~~~~~~

tools/btmgmt.c:2859:2: warning: Value stored to 'argc' is never read
[deadcode.DeadStores]
        argc -= optind;
        ^       ~~~~~~

tools/btmgmt.c:2860:2: warning: Value stored to 'argv' is never read
[deadcode.DeadStores]
        argv += optind;
        ^       ~~~~~~

tools/btmgmt.c:2934:2: warning: Value stored to 'argc' is never read
[deadcode.DeadStores]
        argc -= optind;
        ^       ~~~~~~

tools/btmgmt.c:2935:2: warning: Value stored to 'argv' is never read
[deadcode.DeadStores]
        argv += optind;
        ^       ~~~~~~

tools/btmgmt.c:3000:2: warning: Value stored to 'argc' is never read
[deadcode.DeadStores]
        argc -= optind;
        ^       ~~~~~~

tools/btmgmt.c:3001:2: warning: Value stored to 'argv' is never read
[deadcode.DeadStores]
        argv += optind;
        ^       ~~~~~~

tools/btmgmt.c:3261:11: warning: Value stored to 'index' during its
initialization is never read [deadcode.DeadStores]
        uint16_t index = mgmt_index;
                 ^~~~~   ~~~~~~~~~~

tools/btmgmt.c:3450:2: warning: Value stored to 'argc' is never read
[deadcode.DeadStores]
        argc -= optind;
        ^       ~~~~~~

tools/btmgmt.c:3451:2: warning: Value stored to 'argv' is never read
[deadcode.DeadStores]
        argv += optind;
        ^       ~~~~~~

tools/btmgmt.c:4822:2: warning: Null pointer passed to 2nd parameter
expecting 'nonnull' [core.NonNullParamChecker]
        memcpy(cp->data + uuid_bytes, adv_data, adv_len);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

tools/btmgmt.c:4823:2: warning: Null pointer passed to 2nd parameter
expecting 'nonnull' [core.NonNullParamChecker]
        memcpy(cp->data + uuid_bytes + adv_len, scan_rsp, scan_rsp_len);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

tools/btmgmt.c:5244:2: warning: Null pointer passed to 2nd parameter
expecting 'nonnull' [core.NonNullParamChecker]
        memcpy(cp->data + uuid_bytes, adv_data, adv_len);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

tools/btmgmt.c:5245:2: warning: Null pointer passed to 2nd parameter
expecting 'nonnull' [core.NonNullParamChecker]
        memcpy(cp->data + uuid_bytes + adv_len, scan_rsp, scan_rsp_len);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Manika Shrivastava <manika.sh@samsung.com>
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>