Fix undefined variable tls1 in InitSuites for PSK cipher suite

The WOLFSSL_OLDTLS_SHA2_CIPHERSUITES else-branch for
BUILD_TLS_PSK_WITH_AES_128_CBC_SHA256 referenced undeclared variable
`tls1` instead of `tls`, a copy-paste typo from commit a975ba9
(2019). This caused a compilation error when both WOLFSSL_STATIC_PSK
and WOLFSSL_OLDTLS_SHA2_CIPHERSUITES were defined.

Add PSK CI config with WOLFSSL_OLDTLS_SHA2_CIPHERSUITES to prevent
regressions.

Signed-off-by: Sameeh Jubran <sameeh@wolfssl.com>

Author: sameehj

.github/workflows/psk.yml

@@ -18,6 +18,7 @@ jobs:
       matrix:
         config: [
           # Add new configs here
+          '--enable-psk C_EXTRA_FLAGS="-DWOLFSSL_STATIC_PSK -DWOLFSSL_OLDTLS_SHA2_CIPHERSUITES"',
           '--enable-psk C_EXTRA_FLAGS=-DWOLFSSL_STATIC_PSK --disable-rsa --disable-ecc --disable-dh',
           '--disable-oldtls --disable-tls13 --enable-psk -disable-rsa --disable-dh -disable-ecc --disable-asn C_EXTRA_FLAGS=-DWOLFSSL_STATIC_PSK --enable-lowresource --enable-singlethreaded --disable-asm --disable-errorstrings --disable-pkcs12 --disable-sha3 --disable-sha224 --disable-sha384 --disable-sha512 --disable-sha --disable-md5 -disable-aescbc --disable-chacha --disable-poly1305 --disable-coding --disable-sp-math-all',
           '--disable-oldtls --disable-tlsv12 --enable-tls13 --enable-psk -disable-rsa --disable-dh -disable-ecc --disable-asn C_EXTRA_FLAGS=-DWOLFSSL_STATIC_PSK --enable-lowresource --enable-singlethreaded --disable-asm --disable-errorstrings --disable-pkcs12 --disable-sha3 --disable-sha224 --disable-sha384 --disable-sha512 --disable-sha --disable-md5 -disable-aescbc --disable-chacha --disable-poly1305 --disable-coding --disable-sp-math-all'

src/internal.c

@@ -4250,7 +4250,7 @@ void InitSuites(Suites* suites, ProtocolVersion pv, int keySz, word16 haveRSA,
 #ifndef WOLFSSL_OLDTLS_SHA2_CIPHERSUITES
     if (tls1_2 && havePSK && haveAES128)
 #else
-    if (tls1 && havePSK && haveAES128)
+    if (tls && havePSK && haveAES128)
 #endif
     {
         suites->suites[idx++] = CIPHER_BYTE;